PRESIDENT'S

ESSAGE

Every few years, we add several new words into our vocabulary and then try to make them applicable in our daily conversation. With the advent of the computer came the term "User-Friendly". We all can find a place to use this in our work life and many of us at home. Several weeks ago someone in my department called to my attention an article written by a chemist to chemists where he made a remark about doing your own glassblowing or being in­volved with a user friendly glassblowers shop. This sort of rubbed me the wrong way. Having spent my career in a University Shop and being a service, I have always considered myself "User-Friendly" and I would like to think others run their shops the same way. We have spent a lot of time in our Society trying to build a professional image. Many things go into the making of that image: education, training, acquired proficiency in our craft, and yes, being "User -Friendly". Are we who we say we are? I think we are.

2

Jim Merritt President, A .S.G.S.

40 YEARS of EXPERIENCE DESIGNING, BUILDING, and TESTING in our own I.ABORATORY so you can have the BEST, MOST RELIABLE, STATE- OF- THE-ART Annealing Equipment.

SIZES: (Standard) 12 Inches to 12 FEET! Special sizes too. CONTROL: From the standard ON-OFF to the versatile Microprocessors! PRICES: When comparing to WILT QUALITY and Technology, simply unbeatable!

WILT INDUSTRIES INC. ROUTE 8 LAKE PLEASANT, NY 12108

Telephone: 800-232-WIL T

FAX: 518-548-5504

FUSION Journal of

THE AMERI CAN SCIENTIFIC GLASSBLOWERS SOCIETY

1507 Hagley Road • Toledo, Ohio 43612

Volume XXXVI November, 1989

OFFICERS AND

BOARD OF DIRECTORS President

JAMES K. MERRITT

President-E lect

JOSEPH S . GREGAR

Secretary

RICHARD E. RYAN

Treasurer

IAN B. DUNCANSON

SECTIONAL DIRECTORS Gary Anderson Robert PoolOn Daniel Wtlt Peter H. Oarlte

Adolf G1D1ther David K. Searle A. Ben Seal Daniel J. Baker

Edwin A. Powell Gary S. Coyne

William H. Shoup Fred Kennedy

Peter J. Severn David Cliandler

Joseph R. West George Sites

Director EmeriJus

PAST PRESIDENTS *J. Allen Alexand er

tKarl H. Walther

Arthur Dolenga

Alfred H. Walrod

Richard W.Poole

William E. Barr • Charles J. Cassi dy

*Jonathan W.Seckrnan

William A. Gilhooley

M. Howe Smith

Billie E. Pahl Theodor W. Bolan

Earl R. Nagle

*Deceased

tPresident Emeritus

Werner H.Hask

Gordon Good

Robert G. Cam~ll

*Helmut E. Drechsel

Lawrence W.Ryan, Jr.

Joseph W. Baum Andre W. Spaan

Donald E. Lillie

Wilbur C. Mateyka

Jerry A. Ooninger

David Cliandler

Owen J. Kingsbury, Jr.

Raymond L. Carew

©The American Scientific Glassblowers Society, 1989.

Number4

TABLE OF CONTENTS

President 's Message . . . . . . . . . . . 2

Obituary . . . . . . . . . . . . . . . . . 11

Notice . . . . . . . . . . . . . . . . . . 11

Audio-Visual Report . . . . . . . . . . 12

Education Committee

Report to Members . . . . . . . . 14

"Dimensions for Tomorrow's

Technology" . . . . . . . . . . . . 16

New Products and Literature .. .. ·. 21

Section Meetings . . . . . . . . . . . . 24

Annual Business Meeting . . . . . . . 32

Board of Director's Meeting . . . . . . 34

Notice - Notice . . . . . . . . . . . . 35

Concepts and Techniques . . . . . . . 36

Classified Ads . . . ... . ... . . 44,45 ,46,47

Symposium Committees . . . . . 47

Reference and Abstracts . . . . . 54

34th Symposium in

Pictorial Review . . . . . . . 63

Index to Advertisers . . . . . . . . . . 77

A.S .G.S. 35th Annual Symposium

and Exposition Update . . . . . . 79

35th Sympos ium & Exposition

on Scientific Glassblowing . . . . 80

35th Annual Symposium

and Exposition . . . . . . . . . . . 81

EDITOR James E. Panczner

EXECUTIVE SECRETARY Theodore W. Bolan

OFFICE Executive, editorial and advertising

1507 Hagley Road Toledo, Ohio 43612

Phone : (419) 476-5478

Fax: (419) 478-0636

OFFICE MANAGER Beverly M Pancmer

FUSION is an information journal and assumes no responsibility for the accuracy, validity, or originality of any

contributed article or opinion expressed herein. Subscription rates : $32.00 per year plus postage for subscribers outside the U.S.A. Air Mail -$12 .00; Surface Mail $5.00; per year. Subscriptions by the calendar year only. Subscriptions free to members of the A.S.G.S .. Single copies available at $8.00 per copy plus $1.25 postage (or

$3.00 for Air Mail), either within or outside the U.S.A. Published quarterly : February, May, August and November.

4

CONTEMPORARY KILN, INC. We build confidence!

Because 70% of our sales are repeat customers-internationally known semiconductor/equipment firms in the USA and Japan-you can be confident that an oven built by Contemporary Kiln isn't just an oven ... it represents the confidence our customers have in our reliability and quality of construction.

wound wire or silicon carbide heating elements

Like a list of our customers? Please call John Glossinger, President

415-883-8921 FAX 415-883-2435

brick or ceramic fiber construction

electronic controllers of all types, including chart recording and digital programmable

mercury contactor, SCR or SSR power supplies

~~MPo~ ~ ~ 0 ,, " ,, .\ 1 :....

u u () () u :) \) 'Q. KILN INC.

Go first with Starlite When it comes to working with glass the first name to remember

is STARLITE. From Diamond Core Drills to Diamond Mounted Points

to Drill Presses and Air-Powered Grinders

STARLITE has the right tool for the best results.

Starlite 15" Drill Presses Engineered for Glass

Hollow spindle with automatic lubricant flow.

Enclo sed drip -proof motor. Dead-true chucking

of Diamond Core Drills . Rugged 2" qu ill with

full 4-7/16" stroke. Precision -ground work

table holds interchangeable insert plates drilled

to match 0 .D. of core drill.

Precision in Hole Drilling­

Starlite Diamond Core Drills ,

When it comes to drilling glass

Starlite Core Drills have set the in­

dustry 's pace for years. Made with

exclusive Magnicon Bond ing with

150 Diamond Concent ration for

better finish , longer wear. In sizes

3/32" (2.38mm) to 5" (127.0mm).

Mount ed and unmounted .

Write for FREE CATALOG. DeptFtOO

~ ~

starlite industries

• JDC.

1111 Lancaster Ave • ROSEMONT , PA 19010 • (215) 527 -1300

6

SPECIALISTS IN RESEARCH GLASSWARE FOR

THE GLASS SHOP AND GLASS BLOWERS

Illustrated above are some of the key items in our line of high quality glass components. Behind each is unsur­passed quality, workmanship and service to complete the picture. At Research Glass we're big enough to complete and deliver orders quickly •.• yet small enough to give personal attention to even the smallest details. Write or telephone today for a copy of our new catalog and price list.

RESEARCH GLASS OF NEW JERSEY P.O. Box 1019, Vineland, New Jersey 08360 • Telephone: 609/696·3187

7

Litton HSJ Lathe

L 0 n g B e d

56-1/4" Spindle Nose To Spindle Nose 1429 mm 4-1/2" Spindle Bore Diameter 114 mm

9-1/8" Radial Clearance 232 mm

The Finest Quality At

Competitive Prices !

800/821-8866

t~ing Laboratories International & California 916/273-6176

8

CLEAR-SEAL® ~DINTS No greasing, No leaking, No seizing ... No kidding. The Wheaton Clear-Seal Joints are unground 'fjoints that seal without grease and are completely transparent. Unlike the ground surfaces you are familiar with , Clear-Seal Joints have smooth surfac es which are stronger , resist contamina­tion , and at the same time greatly reduce the possib ility of seizing.

Safer and more economical than ground joints, Clear-Seal Joints are also superior in many vacuum applications . Produc ed to extremely precise toler ­ances Clear-Seal Joints mate to provide consistently reliable positive seals, that hold up even under low pressures.

Wheaton Clear-Seal Jo ints are manu­factured from 33 expans ion borosilicate glass and are available in the following sizes : 'f 14/ 20, 19/ 22 , 19/ 38, 24/ 25, 24/40, 29/ 26, and 29/42.

Free samples available upon request. For more information call 609/ 825-1400 or write:

llbiWHEATON Manufacturers Since 1888

1000 N. Tenth St., Millv ille , NJ 08332, U.S.A.

Call Toll- -Free: 1-800/ 225-1437, Ext. 2768

Bellow Model

Stopcock Yalve

0-4 MM list price $49.50

The bellow model stopcock valve (patented) will offer the ultimate in sealing capability through the use of its "O" ringless design. There are no elastomeric materials contained in the design of this valve.

Wear is not a concern when using this valve. The risk of exposure to corrosion is drama­tically reduced with the use of the bellow stopcock valve. Available in sizes from economy valves to chemical processing and pilot plant operations the bellow valve is an indispensable item for those in the industry.

Call us for details.

Economy Model

Stopcock Valve

0-4 MM list price $24.00

A PTFE and glass stopcock valve (patented) for use with any environment. This valve tooled from standard borosilicate tubing does not contain a seal or "O" ring within its barrel.

This simple construction permits easy operation and assembly while allowing for the sealing of side arms without the integrity of the valve being disturbed .

To be available in most popu lar sizes.

~~~R~:::~E~;~~ ~ ®-:.--TELEPHONE: (201) 356-1553 FAX: (201) 356-2569

10

OBITUARY

CHA~ (Charlie) J. CASSIDY, of Edgewood, PA, passed away August 18, 1989 at the age of 79.

Charlie started at W estingbouse right aftez high school, and during the early part of his career was deeply involved in the developing of glass to metal seals (Kovar). He was a supervisa for many years over six gbmblowers. During the 1964-65 New York City World's Fair, Charlie was chosen to make the glass lime capsule. One of the highlights of his career was when he was instrumental in developing the black and white camera tube used for the first mom landing in 1969.

He was very active in the Piasburgb Tri-State chapter, having helped establish that section. During 1969-70 he seived as President of the National A.S.G .S. Charlie was an avid golfer and retired in 1975 with 47 years of SttVice.

He is survived by his wife F.sther, a daughter and two grandsons.

NOTICE

At the June B.O.D. meeting the deadline date was set for February 1st, 1990 for all National Awards. Please have these in the hands of the Awards Committee by that date. These may be faxed to Jim Memtt (213) 743-7758.

Awards Committee

Holiday greetings and sincere wishes f<r a joyful New Year from the staff of the A.S.G.S. Home Office.

Jim, Bev, and Cindy

11

AUDIO-VISUAL REPORT

The workshop tapes from the Atlantic City, NJ Symposium are still being worked on. As soon as they are edited and put on 1(1." tapes, I will let the membership know they are ready for loan out.

Since June 13, 1989 to September28, 1989, 29 tapes have been loaned to the membership. Thirteen of these are still out on loan.

I'm happy to say that my request for someone to help us out in changing over PAL tapes to our system is being done. Peter H. Clarke from Proctor and Gamble Company is trying to put 360 slides on tape for us. Randy B. Wilkin from the University of Houston is having our seven tapes from the British Society changed over to our system. We want to thank them very much for their efforts on our behalf. As soon as they are available for loan out, I will let the membership know about it.

The workshop tapes from the 1989 Symsposium are available. Contact Owen Kingsbury. Phone: (919) 757-6237.

Owen Kingsbury, Chairman Audio-Visual Committee

WU~Lf(g(K{ diamond sawblades

Write for Uterature

AUTHORIZED DISTRIBUTOR OF ERNST WINTER & SON, INC.

QUALITY DIAMOND SAWBLADES

STOCK WHEELS FOR FAST DELIVERY

METAL BONDED SAWBLADES

N·12·150M 12"x.oso· 1SOgrit N·12·240M 12· x .oso· 240 grit N-14-150M 14"x .060" 150grit N-14-240M 14" x .060" 240 grit

RESIN BONDED SAWBLADES

N-12-220R 12" X .060" 220 grit N-14-220R 14" X .060" 220 grit

Special sizes and specifications available for custom applications .

CALL (215) 536 - 25n

National Scientific Co. P.O. Box 498, 205 E. PALETOWN ROAD, QUAKERTOWN, PA 18951

12

Reboil in PYREX® rod, 11 mm and under, is

the lowest we've ever tested.

· Fewer gas inclusions give you purer, cleaner, better looking rod for

your delicate creations.

"- A;oid blemish in your work. Send the

_ s..,

Jd J'

;._;;;It;' ( '

; "--"

Imagine what we can do together.

CORNING

coupon for more.

r------ ---------------, MAKE IT

PERFEGnY CLEAR D Send me the Corning 'lubing & Rod catalog D Send FREE COPY of Laboratory Glass

/\.-.!: ~ \~

[

~ .. ;

Blowing With Corning Glasses ~

Mail coupon on letterhead with name, title, address. Science Products, Corning Glass Worlcs, P.O. Box 7740, Corning, N.Y. 14830.

L---------------------~

EDUCATION COMMITTEE REPORT TO MEMBERS

Our report this time covers three areas of interest

1. The Lending Library

2. A new A.S.G.S. Brochure

3. A Reference Book on Quartz

Lending Library

The education committee has purchased several new books on scientific glassblowing forour lending library. I believe they represent all that are currently in print. If anyone knows of others, please contact me at (617) 981- 4449. The list of new books is as follows:

Scientific Glassblowing - E. L. Wheeler 2 Copies

Glassblowing, An Introduction to Artistic & Scientific - E. Carberry 2 Copies

Glassblowing for Laboratory Technicians - R. Barbour

Creative Glassblowing - Hammesfahr & Stron

1 Copy

1 Copy

We have received a book from Alex Stuart, of Birmingham, England. Alex is a member of the British Society of Scientific Glassblowers, and was a recent winner of their literary prize, the Lucy Oldfield Cup. He was also the 1982 recipient of the A.S.G.S. Kermit Fischer award. Many thanks to Alex for his donated book: "Scientific and Industrial Glassblowing and Laboratory Techniques", by Barr and Anhorn.

These books, along with the several listed in the August '89 Fusion, are available to members for a thirty day period.

A.S.G.S. Brochure

Development of a revised informational pamphlet is progressing. I have received a society pamphlet from Jerry Cloninger, the existence of which I was unaware. We will build on this, by updating and making esthetic improvements. Discussions have been held with Joe Walas, membership chairman, and we are considering making the membership applica­tion a part of this new pamphlet. We would be glad to have any suggestions.

Reference Book on Quartz

Subject areas to be considered include: History, manufacture, properties, fabrication technique including machining and a guide for design use. Some excellent suggestions for sources of information on these subjects have come from Dave Luptak of Quartz Scientific, Inc.; Jack Capel and Jim Portugal of General Electric Quartz, also Hank Richardson ofG. T. E./Sylvania We are still in the planning stage with this matter. Suggestions always appreciated.

14

David L. Hovey Education Committee M. I. T. Lincoln Labs. Lexington, MA 02173

(617) 981-4449

Imagine what we can do together:

CORNING

D Sena mr the Corning lubing & Rod catalog D Send FREE COPY of Laboratory Glass Blowing With Corning Glasses Mail coupon on letterhead with name, title, address. Science Products, Coming Glass Works, P.O. Bax 7740, Coming, N.Y. 14830.

L---------------------~

"DIMENSIONS FOR TOMORROW'S TECHNOLOGY"

Greetings:

On behalf of The American Scientific Glassblowers Society, we invite you to attend the 35th Symposium in June, 1990.

Although the 35th Symposium is over a year away, we wish to make as much information available as possible at this time. The dates will be June 25 thru June 29, 1990, and the symposium will be held at the Buena Vista Palace Hotel, Orlando, Florida, USA.

We expect a record attendance and the technical program should be excellent. There will be 2 days of Educational Seminars, 3 days of Technical Papers presentations, and 2 afternoons of Technical Workshops. During the 3 days of commercial exhibits, there will be Technical Posters on display, A.S.G.S. video tapes will be shown for 2 days, and there will be an artistic demonstration and auction.

Since the Buena Vista Palace is located on Walt Disney property, you will surely want to bring the entire family. Along with the planned social program, there will be endless attractions and entertainment. In addition to Walt Disney World and Epcot Center, some otherlocal attractions are the M.G.M. Production Studio tour, Sea World, the Kennedy Space Center, Cypress Gardens, Silver Springs, and Busch Gardens.

This is truly a symposium you don't want to miss. Anyone who is interested in making arrangements to attend is invited to contact us for more information. We will be pleased to send a more detailed schedule of events, hotel rates, flight and registration information, and information on local attractions. Please feel free to write us at the following address:

JERRY A.CLONINGER 2816 Arden Way Smyrna, Georgia. U.S.A. 30080

We are all looking forward to seeing you at the 35th Symposium of The American Scientific Glassblowers Society in Orlando, Florida.

JOIN THE NATIONAL SOCIETY TODAY

16

Respectfully submitted, Jerry A. Cloninger

LOAD ME UP 0 Have a Coming representative con actme 0 Send pricing and ordering infonnation Mail coupon on letterhead with name, title, address. Science Products, Coming Glass Works, P.O. Box 7740, Coming, N.Y. 14830.

Imagine what we can do together.

CORNING

ABRASIVE WHEELS

HEATHWAY silicone carbide abrasive wheels are used in the cutting of glass, quartz, ceramic materials, tungsten, titanium and various steels and alloys .

SILICONE CARBIDE ABRASIVE WHEELS

CATALOG NUMBER

856-402 856-404

856-502 856-504

856-602 856-604

DESCRIPTION

12" Wheel,%" Arbor, 1 /16" Thick, 120M Grade 14" Wheel,%" Arbor, 1 /16" Thick, 120M Grade

12" Wheel,%" Arbor, 1/16 " Thick, 120S Grade 14" Wheel,% " Arbor, 1/16 " Thick, 120S Grade

12" Wheel,%" Arbor, 1/16" Th ick, 90H Grade 14" Wheel,%" Arbor, 1 /16" Thick, 90H Grade

PRICE

$5 .70 $7.40

$5 .70 $7.40

$5 .70 $7.40

WHEEL SPECIFICATIONS

120 or 90 This is the carbon grain size

MINIMUM ORDER: 10 WHEELS

DISCOUNTS

S Bonded wheels will give you the best cuts on all types of material but this wheel may not be the most economical.

M Bonded wheels are used for an all-around good cut on quartz , glass and all metals.

H Bonded wheels are used for quartz and all types of metals. This will not giv e as good a cut as the M or S wheels.

18

20 to 49 wheels- 5% 50 to 99 wh eels- 10% 100 or mor e- 15% over 200-consult factory .

WHEELS Available with 11/ , ' arbor upon request .

Other sizes , thickness and compositions are available. Please consult factory for additional information.

Catalog available on request.

903 SHEEHY DRIVE • HORSHAM, PA 19044

TE LEPHONE : 215/443-5128

FAX: 215-674-5243

FUSION ISSUANCE AND CLOSING DATES

a. Published quarterly - February, May, August, November. b. Issued I st of Month of issue date. c. Copy to set due 1st of preceding month. Complete plates and space reservations due 1st of preceding month. Inserts due at printing plant 5th of preceding month. Last forms close 2 weeks prior to publication date. d. Cancellation of space not accepted after 2 weeks before publication date. GENERAL ADVERTISING RATES a. Frequency Page Rates: R.O.P. cost per insertion black and white. Rate earned is based upon number of insertions used within the calendar year.

Full Page .. .. ..... . 1/2 Page . . ....... . . 1/4 Page ...... .. .. .

1 Ti

$253.00 187.00 139.00

SPECIAL RATE CLASSIFICATIONS:

4Ti

$221.00 160.00 124.00

Display, Classified, Classified Notices, ate.

(Rates Net. No Agency Commission. No

Cash Discount . Closing Date is 1st of Month Preceding Publication .)

a. Classified Notices, Positions Open, Positions

Desired, For Sale: $9.00 per column inch, $6.00 extra for code number return. Display

classified in box $15 .00 per column inch. Classified pages are two columns each. Column width is 2-5/16 x 7\/2, average six words per

line, nine lines per inch (8 point type) . Clas­sified advertising accepted in single column width only (2-5/16).

CIRCULATION INFORMATION a. Circulated to members of The American Scientific Glassblowers Society without charge. To others upon annual calendar year sub­scription or by sale_ of individual copies. Dis­tributed by 3rd class mail. Press run l 500 copies. Distribution : 950 to members, 150 to subscribers, 100 to advertisers, 300 retained for single copy distnl>ution.

19

For Fast Service, High Quality

DIAMOND DRILLS & BLADES Write or call for our quote or price list on BALL TOOLS BURRS & POINTS WHEELS & DISCS

Ask about our new mechanized hand tool for etching, engraving glass, ceramics and metal.

LUNZ ER INDUSTRIAL DIAMONDS, INC.

Cable: LUNZERDIAM Phone: (212) 819-0300 Telex: 237629 FAX: (212) 921-4753

48 WEST 48TH STREET, NEW YORK, NY 10036

MOLY-CUP* DIRECT, QUARTZ-TO-METAL

SEALS AND ASSEMBLIES. For improved performance of lasers,

high wattage lamps, sight glasses, flash and furnace tubes, and reactor vessels. With Borneo MOLY-CUP SEALS,

joining quartz tubing to stainless steel tubing, flanges, or tungsten electrodes is easy.

ADVANTAGES APPLICATIONS • Unlimited power into envelope • Feed-throughs • Temperature cycling from liquid

H 2 to 500°C • Concentric electrodes for flash

tubes and lasers • Operating temperatures to 1000°C

in protected environments, 350°C in air, or 500°C with Calora-Coat~

• Short transitions for laser windows and sight glasses

• Smaller, more reliable assemblies • Longer lamp and laser life

Stainless steel-to-quartt tubular transition. Stainless steel tubing allows the use of quick discon­nect and reassembly of the stainless steel.

MOLY -CUP SEAL TIG welded to stainless steel vacuum flange. Available in sizes 3/8" to 2".

MOL Y -CUPS and SEALS available as components , or com­plete seal assemblies. Diameters from 3/8" to 2" for OEM construc­tion. Complete quartt-to-metal con­figurations can be provided from our own glass-working facility.

·Patented

HIGH TEMPERATURE APPLICATIONS. Dual MOLY-CUP SEALS permit 900°C operation for lamps

and lasers. Two MOLY-CUP SEALS separated by insulated vacuum chamber prevent condensation and deterioration of metallic gasses inside envelope. With 900°C cycling capability, greater efficiency and compactness can be achieved in high temperature lamps and lasers.

Call or write Dick Ryan for MOLY-CUP information and catalog.

QUARTZ WORKING EXCELLENCE Rte. 128, Blackburn Circle

Gloucester, MA 01930-2294, U.S.A. 508-283-9000

20

New Products and Literature The listing of a product or literature does not necessarily include .the endorsement of

the Society or Fusion staff. All such items are entered only as a service to the readers of the publication. If further information is desired concerning the item, sufficient address is given so that the company may be contacted directly. We would appreciate your men­tioning in any such communication the fact that you are co"esponding as the result of seeing the item in Fusion.

NEW PRODUCTS ADDED

Ed Hoy's has added a complete line of supplies for Lampworkingfforchwork. Products include glass rods of various diameters, both clear and colored, tools, torches, videos and books.

Seminars are being conducted which provi~ complete instruction and hands-on projects in the art ofLampworking.

Ed Hoy's also stocks a complete line of supplies for other Hot Glass work including Fusing, Slumping, Painting, Casting and Pate de Verre.

Call (312) 420-0890 or (800) 323-5668

for details now!

GLASS JOINT SLEEVES

A new low cost method of producing Tapered Sleeves made from .003 mil thick Teflon® has been developed. These sleeves are for use in R & D procedures involving highly corrosive materials or where protec­tion against grease contamination is needed. They also will prevent "freezing" of assembled joints by offering a low coef­ficient of friction.

...

Contact Phillips Scientific Co., Inc., Middlesex, N. J. 08846, (201) 356-2361.

21

HERBERT ARNOLD

CUT-OFF SAW

GM Associates has in stock a Herbert Arnold cut-off saw. All shafts and parts

exposed to corrosion are made from stain­less steel or other corrosive resistant materials. The saw is suited for cutting wheels from 10 inch to 14 inches in diameter. The rpm's of the cutting wheel can be easily adjusted with a three groove pulley that is accessible through a cover on the top of the saw. The cutting table runs on ball bearings so that smooth operation is guaranteed, and the cutting table has a stop that can be easily adjusted to 45° or 90°.

For more information about the Herbert Arnold cut-off saw, contact the exclusive U.S. agents, GM Associates, at (415) 430-0806, fax (415) 562-9809, or write GM Associates at 9803 Kitty Lane, Oakland, California 94603.

CONICLE PIPE FLANGE CLAMPS

GM Associates now stocks clamps, made by Corning, listed as GM Associates catalog numbers 5125-01 thru 06, for use with conicle pipe flanges. The clamps are sold in complete sets, with replacement in­serts and gaskets also available.

For more information about conicle pipe flange clamps, please call (415) 430- 0806, fax (415) 562-9809, or write to GM As­sociates, 9803 Kitty Lane, Oakland, California 94603 .

Fused glass spheres in a Lab Glass frit enlarged about 50x about100x

A complete line of fritted ware and discs is now available from Lab Glass. All our fritted filters are made of fused , similarly-sized borosilicate glass spheres, so

they have a more uniform porosity than frits made of crushed glass powder or fiber

glass.As a result, Lab Glass frits deliver superior performance.

We invite your inquiries.Also : ask about our graded seals .

Laboratory Glass Apparatus Inc 1200 Fourth Street, Berkeley, CA USA 94710

Telephone: (415) 527-0330 Telex: 338 139 HQ OAK

Write or call for our surplus inventory list of :

• BELL JARS

• GLASS TUBING AND ROD

• STOPCOCKS & JOINTS

• FLASKS, etc.

IPBPBI SCIENTIFIC INC

22

N90 W14337 Commerce Dr . P.O. Box 495 Menomonee Falls, WI 53051 Phone : (414) 251-9300 Fax: (414) 251-7387

One of the few times you'll ever see bubbles in Schott glassware.

Tiny bubbles may have their place, but it isn't in our labg lass . So, while we can never say never about defects, we can say this: You'll see a lot fewer bubbles, stones and inclusions when you use DURAN® labglass .

Uniform wall thickness is another thing

you can count on with our labglass . We see to it that thin walls and thick walls never mix. Because we know that dimen­sional inconsistency always leads to pro­cessing problems.

Getting the product you need when you need it is also a sure bet with DURAN. Which is why we keep such a

DURAN® is a registered trademark of SCHOTI GLASWERKE ,

Mainz , W. Germany.

23

large assortment of shapes and sizes in stock for immediate off-the-shelf shipment.

Fewer defects. Fewer rejects. And less wasted work. That's what makes DURAN labglass worth celebrating.

For a free cop y of our cata log, or for the name and phone number of the DURAN tubing and labg lass dealer near­

est you, contact Schott America, 3 Odell Plaza, Yonkers, NY 10701, or call (914) 968-8900 .

a SCHOTT ~H~AMERICA

SECTION MEETINGS

OHIO VALLEY SECTION

John Dryden tends the grills. Attendees enjoy the cookout.

The summer meeting of our section is usually a family event and this year it was held at the Americana AmusementPart near Cincinnati. Thirty-five members, spouses and children attended. Admission to the park and the fee for the picnic shelter was sponsored by Heathway,Inc., represented by Mr. Tom Mwphy. After a day in the park, a steak cook-out was provided by the Section and enjoyed by all.

Respectfully, Thomas Kern, Secretary

NIAGARA FRONTIER SECTION The Niagara Frontier Section will hold its fall meeting on November 11, 1989. Our

numbers are growing but we still need the support of other members in the region. Those of you out there who have yet to come to one of our gatherings are missing the opportunity to meet with those who share the same skills and professional interests as yourselves. The benefits reaped can be as great as your willingness to come and participate. After all, this is why the A.S.G.S. was founded.

Our next meeting will be held in the spring of 1990. Come and enjoy the fellowship and experience what the Niagara Frontier Section can offer you. Perhaps the technique you are looking for could be found at our next meeting.

Joe West, Director

GREAT LAKES SECTION The Great Lakes Section will hold it's fall Gust a little late) meeting on December 2nd.

Our host will be Dave Daenzer, who is the Supervisor of the Glass Instrument Shop, at Wayne State University in DetroiL

Dave has graciously agreed to allow his shop to become overun with other scientific Glassblowers, for this Saturday meeting. Besides the usual coffee & doughnuts, socializing and technical conversations, a glass Christmas tree ornament competition may be organized.

After the formal meeting, dinner and drinks will be served in a Greentown (section of Detroit) Restaurant.

(continu ed on page 26.)

24

We also .offer all the sizes in between.

DURAN® tubing comes in 220 different

standard diameters, from 3mm all the way up to 315mm. Which is a wider variety of tubing diameters than you can get any­where else.

Having more choices makes it less likely that you'll have to face a common problem: Knowing what you need , but having to take what you can get. With DURAN tubing, you won't have to compromise.

Our stocking distributors help ensure that you'll get what you need when you need it.

DURAN® is a registered trademark of SCHOTI GLASWERKE,

Mainz, W. Germany.

25

No matter what size you specify, all our

tubing has one thing in common: consis­tent quality We work hard to manufacture

the kind of round , straight , high quality tubing that makes your job easier.

For the name and phone number of the DURAN tubing and labglass dealer nearest you, contact Schott America, 3 Odell Plaza, Yonkers, NY 10701, or call (914) 968-8900.

DSCHOTT Li AMERICA

The 1992 Symposium in Dettoit is starting to take shape. Chairman Dave Daenzer and Co-chairman Manfred Langer have informed me that we are booked into the Troy Hilton. Committee positions are being filled and section members are positive that we will host a successful symposium.

I hope to see a good turnout at the December meeting. Respectfully,

Scott Bankroff Chairman

PACIFIC NORTHWEST SECTION The September 9th meeting was held in Vancouver, BC at the Coast Vancouver Airport

Hotel. It was a gorgeous day, about 80° and bright and sunny, and we had about 30 people in attendance. The meeting was called to order by Chairman Carl Nyman and he then introduced Ted Bolan, A.S.G.S. Executive Secretary, and Joe Gregar, A.S.G.S. President­Elect 1990.

Section Director David Searle read a letter reganling the A.S.G .S. symposium to be held in Orlando, Florida in 1990. It is imperative if you have funds available for you to attend this classic affair, to meet some of the glassblowers you knew many years ago or meet some new people in your endeavor or employment The following officers were elected for 1990: Robert McKisick, Chairman-Bothell, WA (206) 485-5(i6(); David Gover, Vice Chairman - Pullman, WA (509) 332-3504, (500) 335-4 734; Paul Trautman, Sec/freas. - Portland, OR (503) 292-6780; David Searle, Director- Victoria, BC (604) 656-7126, (604) 721-7203; David Gover, Alt Director.

Joseph Gregar thanked us for inviting him to the meeting and for those who voted for him to become President-Elect He then pushed the 1990 symposium, asking for papers and any who wished to demonstrate.

David Gover gave an update on the Harvard flowers. He will be spending two more weeks there to clean up an area of the flowers, to show the people who hold the funds so they can see what this will look like after a little work in cleaning and repairing some of the flowers. It is like an act of love for David to do this.

The meeting adjourned at 3: 15 and Happy Hour started at 4 p.m. Thank you Coming Glass. Dinner began promptly at 6 p.m. - thank you Witeg Scientific, Litton Engineering, Quartz Scientific and Schott Glass Co. A special ''thanks" to Witeg and Schott for the beautiful door prizes. Thanks to Litton for the hand torch won by Steve Rak.

University of British Columbia,Canada­Pacific Northwest Meeting, Sept. JO, 1989.

26

Steve Rak tries some colored glass.

( continu ed on page 28.)

You won't have to go through thick and thin with Duran glassware.

Thick walls. Thin walls. A good glass­blower can hand le either without difficulty. It's the combination that drives you to the

brink. That's why we work hard to manufac­

ture Duran® labg lass and tubing with consis tent quality features suc h as uniform wall thickness.

Glassb lowers who have retained their sanity know that dimen sional consistency in labg lass goes a long way toward assuring the quality and integ rity of their finished product, and helps eliminate the need for expens ive and time-consuming stress relieving.

DURAN" is a registered trademark of SCHOTT GLASWERKE, Mainz, W. Germany 27

Round , straight Duran tubes move freely on lathes, increas ing the effic iency of both man and mach ine. Perhaps best

of all, Duran tubing is offered in a greater variety of diameters than is availab le from any other source. So you are more likely to find and get exact ly what you want and need from Schott.

For a free copy of our cata log, or for the name and phone numbe r of the Duran tubing and labglass dealer nearest you , contact Schott America, 3 Ode ll Plaza, Yonkers, NY 10701, or cal l 914-968-8900.

C SCHOTT ~AMERICA

Dave Searle demonstrates his internal scoring fixture.

Joe Molnar makes Canadian geese.

Members and guests, Sept. 9, 1989 Paul Trautman and Joe Gregar in heavy discussion.

Sunday morning, September 10, a workshop was held at the University of British Columbia in the chemistry glass shop. The campus is a beautiful setting with landscaping and flower gardens that the Canadians are famous for.

Steve Rak and Sean Adams hosted the workshop. Dave Searle demonstrated his internal scoring fixture for cutting tubing, Carl Nyman demonstrated a diamond cut-off saw made from Miketa tile cutter. (It worked well.) Paul Trautman brought samples of his colored borosilicate glass and demonstrated how the colors could be altered by the degree of heat applied. The artistic demonstrations by Joe Molnar and Joe Gregar were well received.

There was a good exchange of information from all present.

28

Respectfully submitted, EmieD'Amico

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31

ANNUAL BUSINESS MEETING MILWAUKEE, WISCONSIN

JUNE 27, 1989

The annual busine~ meeting was called to order by President Carew on Thursday, June 27, 1989 at 11:45 a.m.

Acting Secretary Jerry Cloningez read the minutes of the last annual busin~ meeting.

MOTION: By Willy Shoup, 2nd by Peter Claike- to accept the minutes as read.

MOTION PASSED

Treasmer Ian Duncanson gave the treasurer's report based on our financial statements dated May 31, 1989. He also informed the meeting of the new office equipment and their costs that the B.0.D. authorized purchasing for the Home Office.

MO'fION: By Peter CJarke, 2nd by A. Ben Seal- to accept the Treasurer's report.

MOTION PASSED

There was no old busin~.

NEW BUSINESS

President Carew brought up f<r discussion the subject of possibly changing the tide "Junior" in that membership categmy. A lengthy discussion followed.

MOTION: By Peter Clarke, 2nd by Larry Hannon - that we table the present structure disc~ion for three years, then be reconsidered.

MOTION PASSED

There being no further business a motion was made to adjourn.

MOTION: By Joe Barker, 2nd by A. Ben Seal- to adjourn the meeting at 12: 10.

MOTION PASSED

Submitted by

Richard E. Ryan

BOARD OF DIRECTOR'S MEETING JUNE,1989

RAY CAREW, PRESIDENT

MOTION: By William Shoup, 2nd by Gary Coyne - to dispense with reading of minutes from November B.O.D. meeting.

MOTION PASSED

MOTION: By Gary Coyne, 2od by Peter CJarke- that the history of the Society as told by George Sites, be printed in Fusion as an article.

MOTION PASSED

32

MOTION: By A. Ben Seal, 2nd by Gary Coyne-the policy on complimentary tickets to the annual banquet is: there will not be any complimentary tickets provided for the awards presenters at the annual banquet.

MOTION PASSED

MOTION: By Jim Merritt, 2nd by Robert Ponton - I move we sell all back issues of Fusion, years 1956-69 at $12.00 J)C2' bundle.

MOTION PASSED

MOTION: By William Shoup, 2nd by Peter Severn -that the Minolta EP 4300 be purchased for the Home Office as requested by Jim Panczner. Total price should not exceed $11,205.

MOTION PASSED

MOTION: By Peter Clarke, 2nd by William Shoup- to purchase one Radius full page display monitor and adapters, installation and instructions for $1,500.

MOTION PASSED

MOTION: By Daniel Wilt, 2nd by David Searle - to purchase one Minolta Fax Machine #261 for a sum not to exceed $2,500 for the Home Office of the A.S.G.S.

MOTION PASSED

MOTION: By Gary Coyne, 2nd by William Shoup- that an Apple Laserwriter #NT be purchased for a total $3,700 (which includes the Appletalk cable) for the Home Office.

MOTION PASSED

MOTION: By William Shoup, 2nd by Peter Clarke - that restricted funds be reduced from the current balance of $100,000 by $20,000 to $80,000.

MOTION PASSED

MOTION: By Peter Clarke, 2nd by Robert Ponton- that the proceedings be published by the Fusion Editor in a manner deemed expeditious.

MOTION PASSED

MOTION: By Peter Clarke, 2nd by A. Ben Seal-that we accept the policy recommen­dation proposed by the Ad Hoc Committee on non-inclusive language.

MOTION PASSED

MOTION: By A. Ben Seal, 2nd by Peter Clarke - I move we accept Item #3 the limitation clause for the Inclusive Language Policy Recommendations.

MOTION PASSED

MOTION: By Jim Merritt, 2nd by A. Ben Seal - I move that we move the deadline for National Awards to February 15th.

MOTION PASSED

MOTION: By Jim Merritt, 2nd by Daniel Wilt - to grant Lifetime Membership to William H. Tozer.

MOTION PASSED

33

MOTION: BY-LAW CHANGE ART. m SECTION A #4 by William Shoup, 2nd by Peter Severn

Retired Membership may be granted upon application from any member who is no longer able to perform glassblowing duties due to accident, illness or retirement and has been a regular member in good standing for a period which is at least the difference between the member's age and 70 years.

MOTION PASSED

MOTION: BY-LAW CHANGE ART. m SECTION C, PART 4C by R. E. Ryan, 2nd by Robert Ponton.

Associate Membership carries the benefit of being entitled to be a member of a chartered section, right to hold appointive office, right to hold elective office in the section with the exception of Section Director, Alternate Director and other National Offices, and receipt of all Society publications normally disttibuted to the membership.

MOTION PASSED

MOTION: BY-LAW CHANGE ART. m, SECTION A, #1 by R. E. Ryan, 2nd by William Shoup.

Regular Membership may be granted to those persons who have for five consecutive years and currently gain the major portion of their income as a scientific glassblower.

MOTION PASSED

MOTION: BY-LAW CHANGE ART. VI, #3 by R. E. Ryan, 2nd by A. Ben Seal.

Nomination for election may also be made by petition. Nominating petitions must be signed by no fewer than fifteen voting members in good standing and must be accompanied by the name of the nominee and written agreement to serve if elected. These documents must be in the hands of the Secretary no later than the first day of February immediately preceding the date set for elections.

MOTION PASSED

MOTION:ByGaryCoyne,2ndbyA.BenSeal-atthenextmembershipduesmailing, there would be a place to check off wbetha' individual members' phone numbers be placed within the roster. If such a box is not checked, that member's phone number would not be placed in the roster.

MOTION PASSED

MOTION: By Ian B. Duncanson, 2nd by William Shoup - to increase the Memorial Award Fund to $2,000 after adjustment for costs incurred by the 1989 recipient.

MOTION PASSED

MOTION: By Ian B. Duncanson, 2nd by Gary Coyne- that the Home Office directly contact the Treasurer for each disbursement relative ot outside assistance in the Home Office and that a monthly report detailing such disbursements be made by the Home Office and sent to the Executive Secretary.

MOTION PASSED

34

MOTION: By Robert Ponton, 2nd by Peter Clarke- to grant Lifetime Membership to

Dennis Greunke.

MOTION PASSED

MOTION: By R. E. Ryan, 2nd by David Searle-that the budget line item named travel reimbursement be changed to read President's Discretionary Travel Allowance with the three categories eliminated.

MOTION PASSED

BOARD OF DIRECTOR'S MEETING JUNE,1989

JIM MERRITT, PRESIDENT

MOTION: By Robert Ponton, 2nd by Petez Clarke - to disapprove David Edson as chair of the International Liaison Committee.

MOTION PASSED

MOTION: By William Shoup, 2nd by David Searle- that committee chairs proposed by President Jim Merritt be accepted as amended.

MOTION PASSED

MOTION: By A. Ben Seal, 2nd by Gary Coyne - I move the budget (1989-90) be approved as submitted.

NOTICE - NOTICE

MOTION PASSED

Respectfully Submitted Richard E. Ryan

After January 29, 1990, the workphonenumberforJim Merritt will be: (213) 7404106.

35

CONCEPTS AND TECHNIQUES

I'M DOING JUST FINE WITHOUT THE CUT-OFF SAW, THANKS!

by Michael Olsen Division of the Sciences

Yale University New Haven, CT

Suppose you have a large vessel such as a boiling or Erlenmeyer flask with a broken neck which needs replacing. It would be difficult and dangerous to attempt to cut it off with the cut-off saw. If you did. the cut would probably not be perpendicular to the axis of the flask, and it would have to be carefully washed and the cut surface etched clean with HF.

Cutting off the broken neck on the lathe will result in a clean-cut opening perpendicular to the axis of the flask. There are two ways to approach this; the scratch and shock techniques, and the flame-out techniques.

The scratch and shock techniques rely upon the application ofJieat to a scratch to put the scratch under tension and thus yield and direct a crack. With smaller diameter, thin wall tubing this can be done by 'hot-sticking' a scratch. Using a diamond pencil, scratch the vessel circumferentially where you want the break. Steadying your hand upon the carriage burner (if it's cool!), apply the pencil with sufficient pressure to get a nice loud screetch as the scratch is made. Using a wet paper towel. wipe the glass dust away from the scratch. Wet the scratch with water. Heat the end of apieceof cane(3 to 5 mm in diameter) until it balls-up. While still very hot and plastic, apply the hot end of the cane to the wet scratch. Within a second or two it should crack. If the crack doesn't travel completely around the scratch, either repeat the process where the scratch hasn't cracked, or cause the crack to propagate by briskly rapping upon the scratch with a heavy glass rod.

Scratching the glass with a diamond pencil is preferable to using a metal glass knife, as the glass knife will imbed particles of metal into the glass which will cause a reboil line to appear when sealed to. Hot-sticking is the technique of choice to use when opening up the 'seal-off tip' of an evacuated vessel. As the glass of a seal-off tip is typically thick and has atmospheric pressure resisting any effort to remove it, the hot sticking will seldom fracture all along the scratch. Repeat the hot-sticking once again, and then 'knock its head off'; holding the item so that the cracked region faces you and the unbroken region faces away from you, swiftly strike-off the end of the seal-off tip.

An alternative to the foregoing technique can be used to fracture larger diameter, thicker walled tubing. If possible, adjust the lathe to rotate such that the upper surface of the workpiece is rotating toward you and the lower surface is rotating away from you. Score a line with a diamond pencil where you want the crack to propagate. Again, wipe the glass dust from the line with a wet paper towel and then wet the scratch with water. Keep the wet paper towel at hand for a later step. Using a hand torch with a small tip (eg. #2 or 3), direct a very small, sharp flame directly upon the scratch. Adjust the lathe rotational speed to a fairly slow rate, and direct the flame over the top of the workpiece so that the flame flows along the scratch and heats a very narrow region, rather than directing the flame directly into the workpiece which causes the flame to splatter out and heat a wide region around the scratch. Looking over your glasses, watch for the appearance of the first yellow. In most

36

cases, the glass will have fractured evenly and completely by this time. In others, it will be necessary to take the wet paper towel and carefully touch the edge of a comer of it to the bot scratch to cause the crack. The fracture should be sudden, violent. and perfect. Be careful not to allow the wet paper towel to overlap the scratch too much or else small cracks will radiate perpendicular to the scratch and the scratch may not crack (if it does it will likely be uneven as the crack will follow back and forth along several of these secondary cracks while generally following the scratch). These secondary cracks radiating back from the cracked edge are not really such a nuisance, for they will readily heal when carefully heated prior to sealing.

If the scratch resists cracking by the time the second yellow appears, do not continue, for to do so will only lose the scratch ( due to its fusion in the flame) and if a crack is then forced with the wet paper towel it will not likely break where you expect. In this case, either switch to the flame cutting technique described below, or else allow the worlq>iece to cool completely before starting over by rescratching the line with the diamond pencil.

Flame cutting is a far superior technique resulting in less reboil and a more professional look. Let's assume that the workpiece has a single opening, the broken one. Chuck the workpiece into the headstock of your lathe. Chuck the new joint which you intend to replace the· broken member with into the tailstock. It is important that the replacement joint be carefully cleaned and have all of its excess stock glass intact (i.e., do not cut it down to the length you want to extend from the worlq>iece - leave it extra long). Your blowhose will be attached through the tailstock to this joint.

Thus set up, carefully heat the broken region of the flask using either a hand torch or better yet, the carriage burner. Using a carbon rod, flare out the jagged portion until you have accessed a region where the glass is continuous around the circumference of the opening. Now, move the tailstock in toward the workpiece. Preheat the end of the stock tubing of the joint as you move it in toward the worlq>iece. Seal the stock tubing to the workpiece. The jagged portion of the worlq>iece will be radiating out from this seal. Do not get carried away with making this seal smooth, as its only purpose is to allow you to blow into the now sealed workpiece. H necessary, paddle the jagged glass down toward the stock glass of the joint to allow it to pass within the confines of the carriage burner. Move the carriage burner (or hand torch, if that's what you are using) just slightly to the left of this seal. Intensely heat the glass with a small, sharp flame. As the glass softens, blow strongly into the blowhose causing a slight bulge in the still stiff glass. More than anything else, this last step serves to place a visual marker of where your hot zone is, for flame cutting requires a very narrowly defined hot zone. Forceful blowing as opposed to stretching is encouraged at this step, for the glass is still stiff and your joint may come unmated from its compliment chucked into the tailstock if stretching is attempted while the glass is still stiff. After creating the visual marker, continue to intensely heat this region. Flame cutting is accomplished by gradually stretching the glass while supporting it with your breath to its original diameter, thus thinning it to the point that it eventually tears exactly where the torch is. As the workpiece is in the headstock and the withdrawal of the tailstock pulls the thinning glass away from the workpiece, there is no need to ever move the fire(s) once the process is begun. The final result should be a perfectly smooth edge on your worlq>iece, and all the jagged glass is now attached to the excess stock length of the joint. H necessary, measure where you will want the stock glass of the joint cut for mating to the workpiece. Again, a diamond pencil scratch works well for this (two very small - 2 mm long - scratches side by side will remain evident in the flame after the glass becomes plastic, yet will not contaminate nor bum into the glass surface). Move the tailstock well away from the workpiece and attach and then center a piece of heavy cane (5 to 10 mm) to the excess glass of the joint for use as a handle to pull off the excess glass. Flame-cut off the excess glass from the joint.

37

This last technique of using a piece of heavy cane as a handle to flame cut-off excess glass can of course be used to remove the excess stock glass from the workpiece, but only if it is possible to otherwise blow into the workpiece, or if you are proficient at opening up sealed vessels by the flame cutting technique. A word about this last technique is in order.

Suppose that you have used a piece of stock tubing, corked or otherwise sealed at its cold, distal end as a means to pull off glass from a workpiece. If, after the process, the piece is now sealed at both ends, you can be ~ured that there is in fact a fairly strong vacuum within the piece (since the sealing-off was accomplished while the atmosphere thus contained was very hot and therefore rarefied). Asmming that you wish to flame cut-off the sealed end comprising the glass which has just been pulled off of your workpiece, the vacuum within the piece will cause the glass to collapse and gather once it becomes plastic. To overcome this tendency, utifue the otherwise bothersome vacuum to defeat itself and thus allow you to proceed with your world If you were to intensely heat a small spot anywhere on this piece, what would happen once it became plastic? Ssssstt ... pluck, it sucks a hole! Use this to your advantage. Somewhere in the region you intend to remove, intensely heat the glass and allow the vacuum to suck a hole. Should there not be enough glass extending from what you have pulled off of your workpiece to use comfortably as a handle, then attach a piece of heavy cane and center it It should now be straightforward to flame cut-off the waste glass.

All of the preceding techniques are useful enough to be mastered, and fortunately are easy enough to be learned quickly with a few pieces of scrap glass. Flame cutting in particular should be included into your standard repertoire of tricks, for it can be a very great time saver. It makes saw cutting and its consequent cleaning procedures unnecessary. Also, if it can be done in concert with the preparation of the component to be attached (as described above), then both pieces will be preheated and can be immediately attached.

One final comment about what has been described. In attaching a joint to the workpiece it was indicated that it was fitted into its complimentary member, which in turn was chucked into the tailstock of the lathe. For example, you have a female ( outer) joint chucked into the tailstock, and have inserted the male (inner) joint into it. Immediately you should be aware that without further precautions this is a precarious situation, for if nothing is placed within the interface between these two they may seize; if the inner member becomes greatly heated it will expand against and crack the outer member; and if the outer member becomes greatly heated it will expand away from and release the inner member. Many glassblowers insert a wrapping of heatproof paper tape around the inner member and force this into its mate. The paper does not offer very much gripping action between the two surfaces, and almost all papers contain organic binders which will burn out and contaminate your glassware. A happy compromise can be realized by inserting a narrow (3 to 5 mm) strip of heatproof paper into the interface and twisting the two strongly together. The paper provides a region which will 'give' should the inner member expand, and yet 'spring loads' the joint, allowing the ground glass surfaces to grip the two members together even as the outer member may expand away from its mate. A word of warning however - as in all steps involving the exertion of force upon glass, PLEASE take precautions to protect your hands should the pieces fracture. Either put on your heavy heatproof gloves, or else slip on a pair of silicone rubber 'Hot Hands' hand protectors. As much as the author may be a proponent of this paper strip technique, he almost removed his thumb by it! A pair of Hot Hands now lives permanently on top of the tailstock of his lathe.

38

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F&D now,supplles a complete line of Carlisle bench burners, lathe burners, and accessor i~s.

WANTED - GLASSBLOWER Craftsman II

Science Division Workshop Technical Services

Duties: Under minimum supervision, the successful applicant will perform skilled work in the design, consttuction, modification and repair of apparatus and equipment used in a laboratory environ­ment to support teaching and research programs. Duties include fabricating, modifying and repairing experimental and laboratory glass apparatus using a variety of machines and tools; providing technical advice to scientific and enginemng staff on function, properties and proposed design of apparatus and applying knowledge of glass technology. Perfonns other related duties as required. Qualifications: Considerable ex­perience (3 - 5 years) at a journeyman level in glassblowing in a university or related environment; graduation from high school supplemented by the successful completion of an approved apprenticeship program in glassblowing; or any equivalent combina­tion of experience and training. Knowledge of the properties of the materials utilized in the field of assignment and the associated technical and safety procedures is required. Closing date: December 12, 1989 .. Com­petition No.: THS-011-89-09. Please apply in writing stating competition number, and giving details of qualifications, training, and experience, and the names of three sources of reference, and submit to: Direc­tor of Human Resources, Memorial Univer­sity of Newfoundland, St. John's, NF AlC 5S7. In accordance with Canadian im­migration requirements, priority will be given to Canadian citizens and permanent residents of Canada.

WANTED

Planetary chucks for a Litton HSAlathe. Call (507) 284-3901 or (507) 289-0620.

44

JOB WANTED PROFESSIONAL GLASSBLOWER

With ten years experience in bencl\work and lathe operation. Has undergone three years of an "on-the-job training" course in Scientific Glassblowing at the National In­stitute of Science and Technology. Single, born on August 10, 1955. Please write or call: Mr. Reynaldo C. Santillan, #139 J.V. Pagaspas Street, Tanauan, Batangas 4232, Phillippines. Telephone No. 878-1042.

HELP WANTED GLASS WORKERS

Growing manufacturer of X-Ray Tubes seeking glass lathe operators. Openings at different levels depending on skill. We do glass-to-glass and glass­to-metal seals using borosilicate glass. Experience with vacuum tubes a plus.

Due to our growth, we offer stable employment to qualified employees. Our benefits package includes company paid health, dental, life insurance, tui­tion reimbursement and more. Also 401k tax deferred compensatin plan and a separate company paid retirement plan. Please write or call, with work history and expected wage - Mike De­Cicco, Employee Relations Dept., Eureka X-Ray Tube, Inc., 3250 North Kilpatrick, Chicago, IL 60641- Phone: (312) 545-3126, Ext 316. EOE/MF

FOR SALE

Flat Bed Automatic Tubing Cutter, 60" Bed, 24 head Rotary Precision Bore Shrink­ing Machine, Horizontal Bottoming Machine, Medicine Dropper Tip Puller, Electric Conveyor Oven 3-zone 45' long. For more infonnation call 1-800-84 3- 1794 - (609) 696-0014 within NJ.

WANTED - GLASSBLOWERS

Stable, pennanent employment oppor­tunities. We have openings for 2 scientific glassblowers with 1 - 3 years experience and one with 5 years total experience. Our work includes all types of specialized equipment in Pyrex and Quartz. This is not a production line shop. Send resume/ap­plication to: Widgett Scientific Inc., P.O. Box 52808, Baton Rouge, LA 70892. Or call 1-800-326-5502. Serious inquiries only please.

WANTED - GLASSBLOWER

Experienced scientific glassblower (Quartz and Pyrex) non-routine ~blow­ing, design and construction of all types of chemical equipment. Well equipped shop with 6 glassblowers, established 1960. Salary commensurate with experience. Ex­cellent fringe benefits. Send resume or call Cal-Glass For Research, Inc., 3012 Enterprise Ave., Costa Mesa, California 92626-(714) 546-7250.

SCIENTIFIC GLASSBLOWERS

Auburn University Department of Chemistry wants to hire an experienced glassblower able to use borosilicate and quartz glass in the fabrication, modification and repair of a large variety of scientific apparatus including large vac.uum systems. Applicants should send a resume and letter of application to Joy Yeager, Personnel Dept., Langdon Hall, Auburn University, AL 36849. Auburn University is an Affirm­ative Action, Equal Opportunity Employer. Minorities and women are encouraged to apply.

45

VACANCY ANNOUNCEMENT SCIENTIFIC GLASSBLOWER

Scientific glassblower for the University ofldaho, in Moscow, Idaho, with the major duties of design, fabrication, testing, repair and maintenance of glassware for scientific research and teaching laboratories. Must be experienced in all fonns of machining, coating, and sealing. Duties will include fonnal and inf onnal glassblowing instruc­tion. A complete position description is available.

Minimum qualification is five years' ex­perience in the fabrication and repair of scientific glass\\W"e or a combination of fonnal training and R & D apprenticeship and scientific glassblowing work ex­perience totaling five years. Successful ap­pli cant must possess excellent communications skills and a proven record of working effectively with others.

The preferred starting date is January, 1990. Send a letter of application and a resume to Lawrence McBride, Research Office, University ofidaho,Moscow, Idaho 83843 - (208) 885-5842. Letters from three professional references in support of the application must be mailed directly to the Research Office and received by the closing date. Applications will be accepted until December 15, 1989. Search may be extended until an adequate pool of ap­plicants is identified.

The University of Idaho is an AA/EO employer and educational institution.

PYREX GLASSBLOWER FULL TIME

Full time to fabricate laboratory ap­paratus. Located in St. James, NY and Oak Ridge, NJ. Ask for Lynn Kane, after 3:00 p.m. -(516) 862-6702.

2 GLASSBLOWERS NEEDED

The Chemistry Department of the University of Michigan, Ann Arbor is seek­ing two scientific glassblowers, one on a master level and the second on a junior or apprentice level.

The master glassblower should have 8 -10 years experience in designing and the precision fabrication of complex and/or custom glass and/or quartz apparatus using both manual techniques and a variety of machines and tools. Responsibilities also include supervising and maintaining the Department's two person glass shop, providing technical advice to members of the Department, repairing various glass items and doing in-laboratory fabrication and repairs (i.e., vacuum lines, etc.).

The junior/apprentice glassblower should have 1 - 2 years experience in the construction of and repairing of glass ap­paratus. Must have demonstrable basic glassblowing skills. Basic knowledge of various glassblowing machines and tools required.

Salaries will be commensurate with ex­perience. Please forward resume and the names of three references to: Dr. Jack Novodoff, Department of Chemistry, The University of Michigan, 930 N. University, Ann Arbor, Ml 48109-1055. A non- dis­criminatory, affirmative action employer.

HELP WANTED

Quartzware department manager needed by semiconductor equipment manufacturer for in-house quartz shop. Great opportunity for a person with quartz fabrication experience to move up and run your own show. Position requires hands on experience and teaching capabilities. Posi­tion offers excellent remuneration and benefits. Please call (516) 667-1460 (col­lect) to set-up an interview. Richard R. Perel, CVD Equipment Corp., 160 W. In­dustry Court, Deer Parle.NY 11729, U.S.A.

46

HELP WANTED GLASSBLOWER

Full-time, permanent, experienced glassblower to work into position of Shop Foreman. Immediate opening for right per­son. Be able to do primarily custom work with Pyrex, quartz, etc. Repair and rebuild glass apparatus as needed. Please send resume to: Allen Scientific Glassblowers, Inc., P.O. Box 27, Boulder, CO 80306-0027 or apply in person at 3865 Walnut St (east), Boulder, CO 80301. Call Raymond H. Allen at (303) 442-2141 or FAX resume (303) 442-2260. We are an Equal Oppor­tunity Employer. Monday - Friday with Vacation and Holidays.

FOR SALE

Inventory of packaged and unpacked glass tubing, glass standard joints, tapered joints, ball joints and socket joints. Mostly borosilicate - some quartz, and other glass. Phone: (314) 343-8754 (home) or (314) 768-7080 (business).

FOR SALE

Bethlehem Lab Lathe, Model GLlOOA. 33" max. between chucks and 110mm max. chuck diameter. Recently rebuilt and fully operational. $2,500.00. Call (904) 562-5016 and leave message. Will return call ASAP.

FOR SALE

1 Wilt #200 Oven Sec. #9252 - $1,000, 1 Kenney KC 15 Vacuum Pump - $250, 1 Flat Wheel Grinder - $150, 1 Joint Bench Hand Grinder - $50, Complete vase manufacturing shop, semi-mechanical and hand equipment, 5 stations, some material - $10,000, 1 2400 Xorbox Generator -$1,000, 1 25hp Power X Rotary Air Com­pressor - $2,500, 1 Baldwin Buffer on stand, 1/2 hp.- $175. Reeves Glass, Inc., D.B.A.- Scientific Specialties, P.O. Box 2607, High Springs, FL 32643. Phone: (904) 472-6515.

FOR SALE

87' Harrop dilatometer, model 1DA­Hl-A.P.O.; 87" ASTM C338 softening point apparatus/cathodometer/variac/digi­tal display/ and S. S. furnace & stand. S. S. contamination control hood with new l()()ppm HEPTAfiltres, fume hood & meter options. Make offer for entire package. Call Carol at (413) 782-7172.

FOR SALE

Glass & Quartz Blowing Company in France; glassware and laboratory, labware, quartzware, for semi-conductor industry. Suitable equipment. Write to: R.T.L. S.A.R.L., Z. I. Thibaud, 47 Blvd. de Thibaud, 31084 Toulous Cedex, France or call: (33) 61-40-22-33.

SYMPOSIUM COMMITTEES CHAIRMAN - JERRY A. CLONINGER

CO-CHAIRMAN - RICHARD SMITH

EXHIBITS - DON WOODYARD RICHARD SMITH

TECHNICAL PAPERS - WILBUR MATEYKA

SEMINARS - DON LILLIE

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47

48

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DISTRIBUTOR ANO FABRICATOR OF GENERAL ELECTRIC

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MA TE RIALS: G.E. Type 214 C.F .Q. Tubing & Rod

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FABRICATION: Semiconductor Fused Quartzware

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50

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BECOME A MEMBER

YOUR MEMBERSHIP INCLUDES A SUBSCRIPTION TO "FUSION", THE

JOURNAL OF THE AMERICAN SCIENTIFIC

GLASSBLOWERS SOCIETY

MEMBERSHIP CATEGORIES AND FEES FOR 1989-90 ARE (*)

Regular Membership . . . . . . . $50 .00 $15.00 Initiation Fee

Associate Membership . . . . . . $50.00 $15.00 Initiation Fee

Junior Membership . . . . . . . . $50 .00 (*) Specific requirements for each category of membership are detailed on the application for membership available through the Home Office. Or you may contact a Section Direc­tor for the area where you live.

51

Bui Id a unique conversation piece!

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The thermoscope is a thermometer without a scale. Colored vials. carefully balanced for maximum temperature

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Why not take a subscription to the

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Contact B.S.S.G. Hon . Secretary

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current rates.

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21, Grebe Avenue

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own oxygen - and save more than 50%:'

"I think our Xorbox Oxygen Generator was one of the smartest investments we ever made . Our burners ran through about 50 cylinders yearly. And that meant almost $1450 in oxygen costs . We sti ll use the same amount of oxygen - but

Ron E. Legge all it costs is the electricity to Pres .. Scientif ic Glass Design run our Xorbox. Without any

of the handling and delivery problems cylinders gave us !

"Xorbox supplies a steady, unlimited supply by separating oxygen from the air. And we're

in complet e control of pressure , purity and volume . T hat's the kind of dependability I like.

"Xorbox is a smart move for any busy manufacturer'.'

XORBOX OXYGEN GENERATORS The Proven Performers

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HERBERT ARNOLD@ WEILBURG/LAHN GLASTECHNISCHER MASCHINEN - LIND APPARATEBAU LABORBEDARF

GOODBYE, CUTTING PROBLEMS! T Hello, ARNOLD cutting machinery!

GM8610-01 Large Universal Cutting Machine. Accommodates 10"-12"

~ or 16" diamond wheels. For cutting tubes up to 140 mm.

GM8650-01 T Glass tube cracking-off machine-Universal. Expertly designed for high volume manual output. Tube capacities: 8 thru 150 mm; cutting lengths: 3/4 "-16 ". 1 Cracking-off diamond

furnished. 7 burners for Hydrogen & Oxygen connections. Special

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As GM8610-01 (above) able to accommodate 24" cutting blade. Shown with special roller support

for expanded usage (tube lengths up to 118 ").

HERBERT ARNOLD . . .

Unsurpassed experts in the development of specialized equipment for the glassworking io1dustry.

HERBERT ARNOLD. Weilstrabe 21, 6290 Weilburg/Lahn • Western Germany Telex: 48 42 31 arlo d Telefon: (06471) 2061

For details in depth on any of the above or information regarding any of the available Herbert Arnold equipment please contact:

Ml ASSOCIATES, INC .

9803 KITTY LANE•OAKLAND, CA 94603

-T_ E_ L..:::E:::.P_H_o_ N_E_ < 4_1_s_i _4_3_0_- o_ a....;o;...6_ /_F_A_x_ c 4_1_s_i _s_6_2_- 9_ a_o_9~

• @ AU TH OR I Z ED GE FUSED QUAR T Z D I STR I BU TO R

53

After three and one half years, the mighty project is done. The Cumulative Index to the Reference and Abstract Section of Fusion is now complete. It encompasses the years 1962 to the present material in this issue of Fusion. There are over 3100 entries making it a very impressive data base covering material from Workshop Hints to Thin Film Technology. We are currently working on getting a pintout of the final index which will be sent to all members. This will take time, so please don't ask where it is. When it's ready, you'll get it

However, for those of you who have a Macintosh computer (with a hard disk) and have the data base program Filemaker II (or Filemaker 4) and want to have the file for your own, please do the following: send me six already formatted 3 1/l" disks with a self-addressed stamped envelope. I'll send the whole thing back to you with everything ready to go. Nonformatted disks and/or disks with no return envelope will not be returned.

If there is a DOS user out there who wishes to get involved with distribution of this for other DOS users, please contact me.

For information on the Reference and Abstracts Cumulative Index, please contact me at:

Gary Coyne c/o Chemistry Department CSULA

5151 State University Drive, Los Angeles, CA 90032 (213) 343-2312

(Correction: In the last issue there was a citation under Glass Shop - Materials & Techniques titled Workshop Hints. The author of that article was Ian Daniels whose name was inadvertently left out)

The following citations were supplied by:

Cary Coyne

APPARATUS

Earl Nagle Anthony Hawkins

A Sensitive and Inexpensive Suscep­tometer for the Study of High-Tempera­ture Superconductors by R. Baker.Jr.Rev. Sci. Instr., Vol. No. 60, Is. No. 9, September, 1989, pp. 2953-57. A moving sample sus­ceptometer based on a Hartshorn inductive bridge is described. Contains two schematic drawings of the pyrex, metal and plastic apparatus.

Exploiting the Dynamic Properties of FET - Based Chemical Sensors by P. Bergveld, J. of Physics E: Sci. Instr., Vol. No. 22, Is. No. 9, September, 1989, pp. 678-83. Review article of current methods. Contains schematic drawings of the glass apparatus.

54

Glassware for Perfusion Apparatus byI.Daniels,J.oftheB.S.S.G., Vol.No.27, Is. No. 3, 1989, pp. 116-18. Description of how to make the perfusion appartus.

Insitu Sample Cell for EXAFS Meas­uremen ts on Material Treated at Elevated Temperatures in Vacuo by Y. Kurodo, H. Maeda, and T. Morimoto, Rev. of Sci. Instr., Vol. No. 60, ls. No. 9, Septem­ber, 1989, pp. 3083-85. Article discusses the design and utilization of a simple cell for extended x-ray absorption fine structure measurements on catalysts to be tteated at high temperature under vacuum. Two schematic drawings of the glass apparatus are shown.

Preparation or Black Phosphorus Single Crystals by a Completely Closed Bismuth Flux Method and Their Crystal Morphology by M. Baba, et al., Japanese J. of Applied Physics, Vol. No. 28, Is. No. 6,pt. l,June,1989,pp.1019-22.Research paper dealing with the (titled) subject In­cludes a schematic drawing of the simple fused-silica tube reaction vessel for trans­forming Red Phosphorus to the White and Black form.

CUTTING

Laser Cutting or CVD-SiC Fiber I A6061 Composite by Y. Kagawa, S. Ut­sunomiya, and Y. Kogo, J. of Material Sci., Vol. No. 8 Is. No. 6, June, 1989, pp. 681-83. Although not dealing with glass as a material, this article is of interest in that it documents a technique of laser cutting of Silicon Carbide fibre composite material using an Oxygen gas-jet in additon to the usual mirror/lens system.

DISCHARGE TUBE

A Simple, Inexpensive Gas Dis­charge/Cathode Ray Tube by R. L. Weichman,]. of Chem. Ed., Vol No. 62, Is. No. 4, April, 1985, pp. 340. A very simple discharge tube is shown requiring only nails, rubber stoppers, tubing, a screw clamp, and minor glassblowing. This setup

also provides the ability to vary the internal vacuum.

GAUGES - PENNING

Hydrogen Pressure Measurement Using the Intensity or the Light Emitted from a Penning Discharge by N. Ogiwara and M. Maeno, J. Vac. Sci. Technol. A, Vo. No. 7, Is. No. 4, July/August, 1989, pp. 2804-07. This paper describes a new method for using Penning Gauges to measure pressure r high magnetic fields. A pressure from 10- to ... 0.5 Pa is measured successfully in the vicinity of a magnetical­ly confined plasma.

55

GAUGES -THERMOCOUPLE

Thermocouple Gauge for Partial Pressure Measurements by Chi-Luen Wang, et al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2393-96. The design and testing of a ther­mocouple gauge with unique properties is presented; operating the gauge at different temperatures allows one to measure the partial pressure of different gases in a vacuum system. The gauge is sensitive down to 10-4 Torr. Construction informa­tion is provided.

GENERAL INTEREST

The Discovery or Nuclear Fission by E.G. Segre,Physics Today, Vol. No. 42, Is. No. 7,July, 1989,pp.38-43.Fermi'sgroup bombarded uranium with neutrons in 1934, but it was almost. five years before Hahn and Strassmann realized what these neutrons were actually doing. It required superb chemists to bring the comedy of errors to a close. (see also J. of Chem. Ed., Vol. No. 66, Is. No. 5 for several related articles)

Various articles on the 50th Anniver­sary or Man-Made Nuclear Fission by various,]. of Chem. Ed., Vol. No. 66, Is. No. 5, May, 1989. Some interesting and fas­cinating observations on this anniversary. Included is an English translation of the carefully worded German text that flfSt of­fered the explanation that fission can be the only explanation of some observed data. (see Physics Today, Vol. No. 42, Is. No.7, pp. 38 for a related article)

GLASS- CLEANING

Cleaning Solutions for Glassware by P. Page, J. of B.S.S.G., Vol. No. 27, Is. No. 3, 1989,pp.122-23.Fourformulasforsolu­tions to clean glassware with additonal hints.

GLASS- WSTORY

Glass in Modern Technology (A Review Through the Ages) Part 1 by F. Oldfield, J. of the B .S.S.G., Vol No. 26, Is. No. 1, January, 1988, pp. 32-35. History of glass making from ancient Egyptians to 1915 when Coming introduced "Pyrex" and the period of World War I; transition of glass making from artistic to scientific and technical in Europe, primarily England.

Glass in Modern Technology (A Review Through the Ages) Part 2 by F. Oldfield, J. of the B.S.S.G., Vol No. 26, Is. No. 2, April, 1988, pp. 52-57. Continuation of history of glass from World War I through World War II up to the present Goes from the days of radio tubes and early television tubes to semi-conductor devices; touches on methods and making of optical fibers and brings us up to silica-titania and silica-zirconia glasses.

GLASS SHOP MATERIALS & TECHNIQUES

Glass Disc Grinding Jig by P. Brooks, J. of the B.S.S.G., Vol. No. 26, Is. No. 2, April, 1988, pp. 58-59. A jig for grinding glass discs and a grinding lap for parallel rods or tubes.

Heat Exchangers and Adapting a Scroll Chuck to Hold Measuring CylindersbylanDaniels,J.oftheB.S.S.G., Vol. No. 26, Is. No. l, January, 1988, pp. 22-23. Method for making a heat exchanger with three internal coils of identical length and diameter to supply an organ bath is described; also an adapter to fit scroll chuck so graduated cylinders can be held in lathe.

Planning a Glassblowing Workshop by J. Frost, Glass, Vol. No. 66, Is. No. 5, May, 1989, pp. 175-76. Brief description of procedures for setting up a lampworldng workshop for scientific apparatus.

Screen Printing on Glass by C. Butler, J. of the B.S.S.G., Vol. No. 26, Is. No. 2, April, 1988, pp. 63-65. Explanation of what

56

screen printing is; how it can be used on glass; the different screens and a list of inks for glass printing.

Surface Sealing of Sintered Discs in Flat Flanges by A. Stuart,!. oftheB.S.S.G., Vol. No. 26, Is. No. l, January, 1988, pp. 26-29. How to make a thick flat flange on the end of a tube using carbon rod attach­ment to a lathe. Also gives a method of sealing sintered disc on the flange edge.

LASERS

Practical Small-Scale Hollow­Cathode CW Metal-Ion Lasers by H. Tsuda and J. Piper, J. of Physics E: Sci. Instr., Vol No. 22, Is. No. 7, July, 1989, pp. 462-65. Design and technical charac­teristics report paper for sealed off self heated miniature hollow cathode laser tubes operating in the blue and green tran­sitions of Cd+ and the blue-green and near infra-red transitions of Zn+ at milliwatt power levels. Includes schematic drawing of one of the small Pyrex I Kovar I Stainless Steel laser tubes.

MEASUREMENT STANDARDS

New Measurement Standards for 1990 by B. N. Taylor, Physics Today, Vol. No. 42, Is.No. 8, pt. l, August, 1989, pp. 23-26. On New Year's Day, new practical reference standmds for the volt and the ohm will take effect worldwide. Both will be based on highly reproducible quantum ef­fects rather than artifacts. The practical temperature scale will also change.

The Fundamental Physical Constants by E. Cohen and B. Taylor, Physics Today, Vol No. 42, Is. No. 8, pt. l, August, 1989, pp. 8-8d. A 1986 least- squares adjusunent has produced a new set of recommended values of the basic constants and conver­sion factors of physics and chemistry.

0-RINGS

Water Vapor Permeation Through Viton 0-Ring Seals by N. Yoshimura, J.

( continued on page 58.)

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57

Vac. Sci. Technol. A, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 110-12. Ex­perimental results showed that water (and oxygen as well) permeate 0- Ring sem.s, but N2, CO, CO2, and Ar do not

PUMPS

Dry Pumps Operating Under Harsh Conditions in the Semiconductor In­dustry by A.P. TroupandD. Twrell,J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2381-86. New pumps that can handle the rough conditions of the semiconductor industry are a blessing. However, a detailed knowledge of the mechanism by which dusty by-products are generated and transported through the machine, together with the characteristics of particulate deposition, is required when such pumps are serving production wafer­processing equipment.

Selection Criteria for Oil-Free Vacuum Pumps by P. Duval, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2369-72. This paper studies pumps limited to those with a base pressure of 1 mbar and able to exhaust to atmos­phere. Very complete.

PUMPS - CIRCULATING

Simple High-Speed Circulating Pump for Gases by M. Hisham and S. Benson, Review. of Sci. Instr., Vol. No. 66, Is. No. 7, July, 1989, pp. 1349-50. Description of a horizontal, relay operated glass and teflon pump for circulating gases in a closed sys­tem. Schematic drawing included.

PUMPS - CRYOGENIC

Cryogenic Adsorption or Nonconden­sibles in the High-Vacuum Regime by P. A. Lessard, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2373-76. Cryopumps can easily remove the conden­sable gases. However, hydrogen, helium, and neon are not so easy. They must be moved by cryoadsorption. This paper ex-

58

plains the process and technique of cryoad­sorption.

System Level Vibration Spectra or a Low-Vibration Cryopump for Semicon­ductor Processing Equipment by M. Minta and J. Stolz, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989. pp. 2361-64. Cryogenic pumps are preferred for many applications, but use has been limited from some applications due to vibration problems. This study examines the lowest level of vibration from one type of pump without substantial redesign.

PUMPS -TURBOMOLECULAR

Vibrations in Turbomolecular Pumps: Spectra and Source Location by F. Casaro, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2377-80. The most common vibration sources for turbomolecular pumps together with their characteristic spectra are considered in this paper. Topics covered range from an un­balanced rotor to bearing damage.

SILICON

Etching or Thin Si02 Layers Using Wet HF Gas by P.A.M. van der Heide, et. al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3,May/June, 1989,pp. 1719-23. The etching of Si02 layers on silicon with HF/H20 vapor mixtures using a N2 gas flow as a carrier was studied. The results show that HF-gas etch proved to be superior to the liquid-HF etch within certain respects.

Reaction of Water With Hydrofluoric Acid Treated Silicon and Surfaces by D. Graf, et. al.,J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 808-13. Si wafers were treated in 40% HF (1 min) and then water rinsed for different time (10 s to 50 h). Oxygen uptake and oxide formation were investigated as well as the various products that were formed. There was also evidence of corrosive attack by H20 which followed the oxide growth.

THERMOMETERS

Study or the Freezing Temperature or Benzoic Acid as a Standard Reference Material in Thermometry by M. Halawa, et al., Journ. of Materials Sci., Vol. No. 24, Is. No. 7, July, 1989, pp. 2619-22. Study of the characteristics of 99.97% pure benzoic acid and the preparation technique used in the collection of this standard reference material. Includes two schematics of the apparatus used

THIN FILMS

An Inexpensive "Shuttered View• port" Device by A. Chambers, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 2, ~h/April, 1989,pp.259-60.Describes adding a glass to metal seal ( with a window on the end) to a metal bellows tube, and then adding this to a vacuum flange to be at­tached to a vacuum system for thin film deposition. By flexing the window so that the window is out of "line of sight", there will be no deposition on the window during the deposition process.

Preparation and Properties or Diamondlike Carbon Films by J. Franks, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 2307-10. Hard adher­ing coatings have been deposited on ger­manium, silicon, titanium, aluminum, glass, and various plastics.

Window Cleaning and Fluorine In­corporation by XeF2 in Photochemical Vapor Deposition by A. A. Langfor, et. al., J. Vac. Sci. Technol. B, Vol. No. 7, Is. No. 3, May/June, 1989, pp. 437-442. A new method of maintaining window transparen­cy in photochemical vapor deposition has been developed in which the window is continuously etched clean during the deposition process.

THIN FILMS - DEPOSITION

Thin Film Deposition in Ultra Clean Environments by K. L. Lewis, et. al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3,

59

May/June, 1989, pp. 1413-19. Significant improvements can be made in the fabrica­tion of optical thin film structures by using molecular beam and ultra high vacuum techniques. In recent years there have been vast improvements made in the availability, reliability, and complexity, of equipment and engineering design.

THIN FILMS- PLASMA

Preparation or Y-Ba-Cu-0 Supercon­ducting Thin Films by the Mist Microwave Plasma Decomposition Method by A. Koukitu, et. al., Japanese Journ. of Applied Physics, Vol. No. 28, Is. No. 7, pt. 2, July, 1989, pp. Ll212-13. Su­perconducting thin films of the (titled) materials were prepared on single crystal Mg{lOO) substrates by a new technique. Schematic drawing of the fused- silica ap­paratus is shown.

THIN FILMS- SPUTTERING

Evaporation and Sputtering: Sub­strate Heating Dependence on Deposi­tion Rate by A. N. Pargellis, J. Vac. Sci. Technology A, Vol. No. 7, Is. No. 1, January/February,1989,pp.27-30.Sputter deposition has two main sources of sub­strate heating: the heat of condensation and the kinetic energy of the incident atoms and ions. Data are presented for the power ab­sorbed by the substrate as a function of deposition rate for sputtered copper which are compared with other investigators for evaporated aluminum and sputtered aluminum and copper.

THIN FILMS- VAPOR

Characterization or a New Reactor for Remote Plasma Chemical Vapor Deposition by A. D. Huelsman andR. Reif, J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 4, July/August, 1989, pp. 2554-61. A new plasma metalorganic chemical vapor deposition (CVD) was designed that uses a new unique reactor geometry which is par­ticularly well suited to remote plasma (CVD).

Preparation of Ultrarme Zirconium Dioxide Particles by Thermal Decom­position of Zirconium Alkoxide Vapour by M. Adachi.et. al.,J. of Material Sci., Vol. No. 24, Is. No. 6, June, 1989, pp. 2275-80. Technical research paper dealing with the deposition technique used in this electrical conductivity study. Contains a schematic drawing of the glass/metal deposition chamber for fine particles.

The Deposition Rate and Properties of the Deposit in Plasma Enhanced Chemi­cal Vapor Deposition ofTiN by D. H. Jang, andJ. S. Chun,/. Vac. Sci. Technol.A, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 31-35. The deposition rate (and the character of the deposition) of TIN is af­fected by the deposition temperature, rf power, and electrode spacing. Specific temperature ranges provide specific

deposition characteristics.

VACUUM- CONTAMINATION

Prospects for a Contamination-free Ultravacuum Facility in Low-Earth Orbit by R. J. Naumann,/. Vac. Sci. Tech­nol. A, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 90-99. Im­agine having a vacuum system with an in­finite vacuum pump so that there was no 'blips' of pressure or, when you heated a sample there was no pressure rise, and best of all, never any contamination. This article details the potentials of vacuum work in outer space using the space shuttle and/or satellites as vacuum labs.

VACUUM - DESIGN

Specifying and Evaluating Vacuum System Purchases by J. O'Hanlon,J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 2, March/April, 1989, pp. 202-09. The proce­dure for purchasing large industrial vacuum systems is described. It describes the ele­ments of a request for quote, the response to the quote, selecting the supplier, the in­stallation, and finally the difficulties that can be encountered.

60

VACUUM -FEEDTHROUGH (MECHANICAL)

Cryogenic Sample Manipulator for Multipurpose Analysis by V. K. F. Chia, et al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 108-09. This off-axis sample manipulator can ac­cess all the experimental stations in this setup. It can be cooled to 15°K and can move in all XYZ directions.

Lubrication of Viton 0-Rings in Ultrahigh Vacuum Rotary Feedthroughs by E. Puckrin, et. al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 4, July/August, 1989, pp. 2818. A process is described that allows lubrication with UHV diffusion pump oil (Santovac 5) and powdered graphite on Viton 0-Rings in differentially pumped rotary feedthrou.ghs that significantly reduces pressure bursts and friction.

VACUUM- LEAK DETECTION

A Trapless Leak Detector by W. C. Worthington, Research & Development, Vol. No. 30, Is. No. 3, March, 1988, pp. 75-80. Helium leak detectors have provided the vacuum industry with tremendous abilities in leak detection. There have been a few drawbacks such as extensive main­tenance and the constant demand for liquid nitrogen. This article describes several sys­tems that do not require cold traps, and have automatic microprocessor-controlled operation.

VACUUM- MATERIALS

Use of Niobium in the Fabrication of Parts for Ultrahigh Vacuum Equipment by R. P. deCarvalho, et al., J. Vac. Sci. Technol. A, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 112-13. To date most sample holders for molecular­beam epitaxy (MBE) are made of tantalum, molybedenum, or tungsten of 99.97% purity. Here, sample holders ofniobium (of 99 .9% purity) were used with great success.

I

VACUUM-TECHNIQUES

On Rapid Thermal Proceuing With Quenching Under Controlled Ambient or Vacuum Conditions by A. Kaaz, M. Albin, and Y. Konnen,J. Vac. Sd. Technol. B, Vol. No. 7, Is. No. 1, January/February, 1989, pp. 130-32. Rapid Thermal Process­ing (R1P) attempts to obtain many cycles of heating and cooling in a vacuum state. However cooling is seldom satisfactorily unifonn. This set up and process seems to solve the problems. Schematic drawings included.

VACUUM- ULTRAIIlGH

Conductance Modulation Method for the Measurement of the Pumping Speed and Outgassing Rate of Pumps in Ultrahigh Vacuum by K. Terada, eL al., J. · Vac. Sci. Technol. A, Vol. No. 7, Is. No. 3, Mayllune, 1989, pp. 2397-402. A new method, named the conductance modula­tion method (CM method), was developed for the measurement of pumping speeds (inttinsic and net) and outgassing rates in vacuum systems. The details of the for­mulation and the procedure of the CM method are described.

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34th SYMPOSIUM IN PICTORIAL REVIEW

... "And another one bites the dusL" The 34th AS.G.S. Symposium is just a memory for most. Your symposium committee trusts that all who attended had the opportunity to learn something and had some fim at the same time. Milwaukee, with its beautiful lakefront, was proud to be your host For those who could not make it down to the lake, the hotel graciously arranged to bring the lakefront right into the lobby of the hotel. And you probably thought that flood was accidental!

A full complement of papers, posters, workshops and seminars provided an excellent technical program. I'd like to thank all of the committee chairs for organizing these programs. I would especially like to thank all those who shared their knowledge. Without the enthusiastic support of those willing to present information, our meetings would be much less successful.

Our artistic evening was also a great success. Yet another record amount was raised for charity. $1,747.00 has been donated to the Center for Deaf-Blind Persons. Thank you to all who demonstrated, donated and, of course, to those who purchased.

The door may be closing on the 34th Symposium; however, the door to the 35th is open and ready to welcome you. By presenting a paper, poster or workshop in Horida, you will be a special part of what promises to be an exciting symposium. Jerry Cloninger and company are waiting to hear from you.

Happy Thanksgiving from everyone on the 34th Symposium Committee. Thanks for making "Milwaukee, A Glass Act in '89."

Respectfully Submitted, Robert J. Ponton

Helen Keller National Center Affiliate

July 25, 1989

Mr. Robert J. Ponton Department of Chemistry

University of Wisconsin - Milwaukee P.O.Box413 Milwaukee, Wisconsin 53201

Dear Mr. Ponton,

On behalf of the Board ofDirectorsof theCenterfor Deaf-Blind Persons, I wish to express my appreciation to the members of the American Scientific Glassblowers Society for the generous donation of$1,747.00.

63

I was delighted when Ellie Burke informed me that our Center had been chosen as the recipient of the profit from your artistic auction. It reflects confidence in our program and serves as a great morale booster in a field that is unique and challenging.

These funds will be used to continue and expand our rehabilitation training and education programs for the doubly disabled of the Greater Milwaukee area.

It's commendable of this professional body to share its God-given talents with those who are not so fortunate. Surely you will be blessed.

Sincerely,

Ruth Silver Executive Director

LE'ITER TO A.S.G.S. Could I convey a big ''THANK YOU" to your Society members and to everyone

concerned with the excellent symposium? It was my good fortune to attend, and yes, I do agree, Milwaukee is a Great PJace on a Great Lake.

Many thanks also to all the people I met who invited me to visit their workshops and places of business.

Perhaps I will be able to repay the hospitality shown to me if or when you're ever"down under".

Thanks again,

Registration Desk - The Brain Center

Gavin Duthie Glassblowing Service- University of Adelaide

South Australia

64

Annual Business Meeting

Papers Presenters

~

Ehibitors Reception

.a Poster/Workshop Luncheon

65

Papers Presenters

Exhibits Open

Posters

Dr. Glen Schmieg, University of Wis.-Mil., Keynote

Dr. Schneider, Seminar. Ouch?

Willie Shoup, Seminar

Jr. Member Seminar leaves/or Univ. of Wis.

Spouse trip-Lynn Ponton standing.

66

ih

Dr. Shriver, Northwestern Univ. Seminars

Jr. Member Seminar Instructors. They're too old to be Jr. Members.

Spouse Hospitality

Departure for zoo night.

Zoo night

Speaker's breakfast

Chairman's lunch?

Don Edwards-Aldrich Chemical Workshop

G. Finkenbeiner-Workshop Bill Wasemiller-A.ldrich Chemical-Workshop

MikeOlsen­Yale-Workshop

Joe Gregar - Arrgonne-Workshop Gary Coyne- Workshop

67

Dave Blessing- Notre Dame-Workshop

BobMcAnally-AT&T Workshop

Bill Langley-Ace Workshop

Gary Del/camp-Aldrich Chem. Workshop

.._ Artistic Night-Ben Agam

Pre-Banquet Social Hour

Adolf Gunther- Workshop

Artistic Auction-$1,747.00 raised

Pre-Banquet Social Hour

68

Robert Ponton opening banquet.

Our president and his boss.

Charlie Amling. Wale Award winner­Best Poster.

Dave Daenzer, Kermit Fisher Award winner-Best Paper.

69

Jim Merritt thanking Ray Carew for a job well done.

Joe Gregar installed as president-elect.

Don Woodyard-Memorial Award

·~ ~ -~ . . '" · · ::..,.

Del. Valley Award-Bob Gojfredi

Awards-Duncanson, Midwest; Cloninger, N.Y. Golden Blowhose; Ponton, Southeast - Lampshop Hint.

Fred steals the show! Never wort with animals, children or Fred.

70

Thanks, Lynn!

George and Dolores Sites

Discussing the future of the A.S.G.S.?

71

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Ace Glass, Inc. • . • . • . . . . . . . . 29 Ad-Glass . . . . . . . • • . . . . . . . • 51 AirSep . . . . . . . • . . . . . . . . . . 48 Arnold, Herbert . . . . . . . . . . . • 53 Bethlehem Apparatus Co., Inc. • . . • 83 Borneo, Inc. . . . . . . . • . . • . • . . 20 Brunfeldt, R. J. Company . . . . . • . 78 Carlisle Gas Burner Corp. . . . • . . . 73 Ceramic Fiber Fabrication, Inc. . . . 57 Chatas Glass Company . . . • . . • . . 62 Chemglass, Inc. . . . . • . . . . . . . . 40 Contemporary Kiln, Inc. . . . • • . . 5,77 Corning Science Products ...•... 13,15,17 Dyna-Cut, Inc. • . • . . . . . . . . . . 79 Ed Hoyt's Hotline . . • . . . . • . . . 41 Finkenbeiner, G., Inc. . . . . . . . . . 77 Friedrich & Dimmock, Inc. . . . . . . 42.43 G. M. Associates, Inc. . . . . . . . . . 39 Glass Warehouse . . • . . . . . . . . . 74 Heathway, Inc. . . . . . . . . . . . . . 18 Houde Glass Company . . . . . . . . . 51,77 Laboratory Glass Apparatus, Inc. • . 22 Litton Engineering Laboratories . . . 8,75 Lunzer Industrial Diamonds . . . • . 19 Mark Optics, Inc. . . . . . . . . . . . . 31 National Scientific Company . . . . • 12,50 New Development Corporation . . . . 61 Pope Scientific • . . . . . . . . . . . • 22 Research Glass of New Jersey . . . . . 7 Schott America ....•......•. 23,25,27 Scientific Machine & Supply Co. . . . 10 Starlite Industries, Inc. . . . . . . . . 6 Wale Apparatus Co. . ..• Outside Back Cover Wheaton . . . . • • . . • . . . . . . . . 9 Wilmad Glass Company, Inc. . . . . . 30 Wilt Industries, Inc. • . . . . . . . . . 3,76 Witeg Scientific . • . • . . . . . . . • . 49 Xorbox . . • . . . . . . • . . . . . . . 52

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78

A.S.G.S. 35th Annual Symposium and Exposition Update

Although the Symposium is over 6 months away, things are starting to fall into place. As of September 15th, 34 of the (i() booths are sold. We would like io take this opportunity to thank those exhibitors who have already taken booths. We have included a map of the exhibit hall and a list of the exhibitors with their respective booth numbers.

The refurbishment of our hotel, the Buena Vista Palace, is complete. Everything has been redecorated at a cost of $2-million dollars. All rooms and suites have private balconies or patios, many overlooking Epcot Center and Walt Disney World Village. Rooms have either king-sized bed, sleeper sofa and sitting area, or two queen-sized beds and adjacent conver­sation area. Many rooms open on to one of two central atriums or a courtyard. The air-conditioned rooms also have 52-inch Hunter ceiling fans, remote control color TV, and direct dial "Mickey Mouse" phones in bedrooms and extensions in bathrooms. Six rooms are equipped with special wide doors and hold bars to accommodate wheelchairs.

The Palace has 45 suites, including two presidential suites, each with kitchen, living and dining rooms, and one to five bedrooms. Two ''Crown Levels" offer complete concierge services for guests in 78 rooms. Concierge floor services include unpacking and packing of luggage, nightly tumdown, gannent pressing and complimentary use of bathrobes. Con­cierge also means a hospitality room that serves breakfast, afternoon hors d'oeuvres and cocktails, as well as late-night cmtials and desserts.

As a world-class luxury hotel, all guests are offered 24-hom room service; concierge; nightly tumdown service with mints and flowers on bed pillows; computerized card keys; free self-parking; valet parking; international currency exchange; airline assistance; safety deposit boxes; laundry and shoe shine. Individual room amenities include luxury bath soaps, shampoos and bubble baths; sewing kits; shower caps; stationery; and other grooming accessories.

The room rates that wehaveconttactedfor are: $95.00 single andSl 10.00 double through quad. In June, 1990 these rates will be roughly half of the standard price. Suites are offered at 20% off the standard rack rate. These special rates are available 4 days prior and 4 days after our convention. Although the A:S.G.S. advance program will be sent out in mid­January, we suggest that you make your reservations early. We recommend doing this by the end of February if possible. To make reservations by mail you may write to: Buena Vista Palace at Walt Disney World Village, P.O. Box 22206, Lake Buena Vista, Florida 32830-2206. The phone number is (407) 827-3333 but you may want to use the toll free number . . . U.S. andCanada-(800) 327-2990. If you are calling from Florida dial (800)432-2920. The phone number for the hearing impaired is (305) 827-6046 TDD. Be sure to tell the hotel that you are with the A.S.G.S.

As this article goes to press, we are negotiating an official A.S.G.S. limousine service and car rental agency. As a result we expect discounted rates of course. As we have mentioned before, Delta is the official airline of the 35th Symposium. When we send out the advance program in mid-January, we will have a toll free phone number and code to make airline reservations with Delta at a discount rate.

The 35th Symposium Committee is working on a Spouse's program called "Behind the Scenes at Disney". This spouse's function is limited to adults only and goes literally behind the scenes to see the workings of Disney World. As we understand it, this is an experience

79

that not many people are afforded. Information is sketchy at this time and we will be releasing details later. Those who prefer relaxing at the hotel at one time or another will surely want to check out the four-acre recreation island. This part of the hotel features a complete range of facilities including two luxurious tropical swimming pools ... one freeform with both indoor and outdoor exposure and one competition-style adult and family pool; children's pool; whirlpool; sauna; four lighted tennis courts, including a stadium court; electronic gameroom; horseshoes; volleyball; Jungle Gym; and two and three-mile jogging trails.

As an official hotel of Walt Disney World, the Buena Vista Palace offers privileges and benefits not available at other area hotels. Complimentary transportation is provided to all Disney attractions. There are reduced rates on golf at the three 18-hole Disney courses. The A.S.G.S. 35th Symposium will purchase, at a discount, a block of"Exclusively Yours" 5-day passes to Epcot, Disney World, and MG.M. Studios. These will be available at the registration desk. Projected cost of these will be around $95.00 per person.

As you can see, this will surely be a symposium to remember. The symposium committee is hoping for a record attendance. If your are planning to attend, please make your reservations early. If you are an exhibitor, and have not reserved your booth, please contact us as soon as possible. We don't want anyone to get left out of this truly unique 35th Symposium of the American Scientific Glassblowers Society.

Sincerely, Jerry Cloninger, Chairman

Richard Smith, Co-Chairman

35th SYMPOSIUM & EXPOSITION on SCIENTIFIC GLASSBLOWING

Hosted by the Southeast Section

American Scientific Gl~blowers Society

"DIMENSIONS FOR TOMORROW'S TECHNOLOGY"

EXHIBITORS as of September 15, 1989 BOOTH NO.

Ace Glass Inc. . ....................•......... 3

AirSep Corp. . ......•..•..•...•.............. 54

Carlisle Machine Co. . . . . . . . . . . . . . . . . . . . . . . . . . . . .12,13

Chemglass ................................. 26

Contemporary Kiln, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . .53

Friedrich & Dimmock/Kimble/Kontes . . . . . . . . . . . . . . . . . . .19, 20

Glass W arehousse . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

G M Associates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1, 2

80

EXHIBITORS as of September 15, 1989 BOOTH NO.

Heathway . . • . . . . . . . . . . • . . . • . . . . . . . . . . . . . . . .5, 6, 7

Heraeus Amersil .....••.•.••.................. 4

Ed Hoy's .........•.••••..••............... 60

Litton Engineering Laboratories . . . . . . . . . . . • . . . . . . . . . .36, 37

Pyromatics . . . . . . . . . . . • . . . . • • . . • . • . • . . . . . . . .38

Richland Glass Co. . . . . . . . • • . . • • • . . . . • . . . . . . . . . .34

Wale Apparatus Co. . ...•.•....••.....••....... . 55, 56, 57

Wilt Industries . . . . . . . • . . . . . . • . . . • . • • • . . . . . . . .27, 28, 29

Ernst Winter & Sons Inc .........••...••••........ .41, 42

Witeg Scientific . . . . . . . . • • • . . . • • • • • . . • . . • . . . . .32

Xorbox Corp. . .......•.•.•••.•.....•••....... 8

Coming ..........•..••.......•.•.......... 17, 18

VM Glass ..................•....•.......... 22

Star lite Industries . . . . . . . . . . . . . • • . . . . . . . . . . . . . . . 4 5

Schott America . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49, 50

FLOOR PLAN SHOWN ON NEXT PAGE

35th ANNUAL SYMPOSIUM AND EXPOSITION

Workshops Committee - To All Members of the A.S.G.S.

Now is the time to let us know what kind of demonstrations you would like to see done at our 35th symposium. We need time to get volunteers to do them and if you don't have your own material, we need time to gather the machines and materials to carry out the demonstrations.

If you have something you would like to demonstrate to the members, please let me know as soon as possible.

81

Owen Kingsbury - Worksfwp Chairman

Chemistry Department

East Carolina University Pfwne (919) 757-6237

(, I

ENTRAHCE

31 \62•10'X IO'BOOTHS

.POSTERS.....,...

LOUNGE ~

21 15 1'1

FOR VALUE AND SERVICE

PATRONIZE THE 0 D

82

NEW FEATURES: • A STAINLESS STEEL BURNER FACE of .015 inches thick is silver clad to the

copper head to prevent burner head particles from contaminating the glass.

• REDUCED CANDLE GLARE with an added row of oxygen holes around the outer gas ring. The added oxygen allows for a more complete combustion for fuels like propane or butane .

• THE BRASS VALVE STEM now seats into a brass piece with teflon backing. You now get a positive shut-off without valve seat wear.

The burner head incorporates two distinct burners , large and small, operating independently or simultaneous ly to work hard glass tubing from 3mm to 100mm. Both inner and outer flames are surface mixing and produce quiet, intensely hot and penetrating blue fires without the objectionable flashback and noise of premix torches .

BETHLEHEM APPARATUS CO., INC.

890 Front St., P.O. Box Y, Hel lertown, PA 18055 • 215-838-7 034

_---,, __

. ~ .

~ = ~ U V ./

-2473* other reasons to choose WALE. Large & small bore lathes, annealing ovens, , abrasive cut-off wheels and machines, chucks, burners, hand tools, diamond tools, glass products ... All supplies, one source: WALE.

·current quantity of catalog numbers listed, not including : Glass & Plastic products and Machinery.

215-838-7047