SCIENCE-ADVERTISEMENTS

El.U-

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I . WILEY B-OOKSfor your V-12 and AST courses

in ORGANIC CHEMISTRY0

A BRIEF COURSE INORGANIC CHEMISTRY

By REYNOLD C. FUSON, RALPH CON-NOR, CHARLES C. PRICE, and HAROLDR. SNYDER.

An elementary textbook and laboratory manual.The fundamental concepts and the more impor-tant types of organic compounds are discussed asearly as possible, and are constantly used through-out the remainder of the book.

(1941) 248 pages; 6 by 9; $2.50

ORGANIC CHEMISTRYBy REYNOLD C. FUSON and HAROLDR. SNYDER.

Designed for an introductory course, the materialis divided into two parts. Part I covers the prin-cipal types of organic compounds, and Part IIthe more advanced aspects of these compounds,with particular emphasis on the use of organicreactions in synthesis.

(1942) 506 pages; 6 by 9; $3.50

AN INTRODUCTION TOORGANIC CHEMISTRY

By IRA D. GARARD.A revised and somewhat enlarged edition of awell-known book for brief introductory courses.The simplicity of the laboratory apparatus andmanipulation has been retained.Second Edition (1940) 389 pages; 6 by 9; $2.75AN INTRODUCTION TOORGANIC CHEMISTRY

By the late ALEXANDER LOWY andBENJAMIN HARROW.

This book gives broad principles and general re-actions in a readable form. It. emphasizes theconnecting links that bind organic chemistry tomedicine, dentistry, pharmacy, and other biologi-cal sciences.Fifth Edition (1940) 400 pages; 6 by 9; $3.00TEXTBOOK OF ORGANICCHEMISTRY

By GEORGE HOLMES RICHTER.A comprehensive, teachable textbook, revised toinclude current subjects of importance. Excellentas the foundation for a solid course for beginningstudents.Second Edition (1943) 760 pages; 6 by 9; $4.00

0

LABORATORY MANUALSLaboratory Outlines and Note-book for Organic Chemistry

By CECIL E. BOORD, WALLACE R.BRODE, and ROY G. BOSSERT.241 pages; 8i by 10j; Paper; $1.76

Laboratory Manual ofOrganic Chemistry

By HARRY L. FISHER.Fourth Edition (1938) 412 pages;

5S by 8j; $2.75.

Laboratory Book of ElementaryOrganic Chemistry

By the late ALEXANDER LOWY and WIL-MER E. BALDWIN.

Second Edition (1934) 182 pages;8j by 11; $2.50

Laboratory Manual of Ele-.mentary Organic Chemistry

By GEORGE HOLMES RICHTER.(1940) 128 pages; 6 by 9; $1.25

JOHN WILEY & SONS, Inc., 440-4th Ave., New York 16, N. Y.1

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SCIENCE-SUPPLEMENT

SCIENCE NEWSScience Service, Washington, D. C.

THE SCIENCE TALENT INSTITUTETHE most talented young scientists in America went

to Washington on Friday, March 3, to attend the ScienceTalent Institute conducted by the Science Clubs ofAmerica, and to compete for Westinghouse ScienceScholarships.

Selected in the nation-wide third annual Science TalentSearch with nearly 15,000 entries, all seniors in secon-dary schools, these boys and girls listened to a score ofeminent scientists, visited scientific institutions in thenation's Capital, and made plans for pursuing scientificresearch careers. Those invited numbered 40, of whom28 were boys and 12 girls.

Dr. Karl Compton, president of the Massachusetts In-stitute of Technology and member of the National De-fense Research Committee, made the principal address ofthe meeting when on Tuesday evening (March 7) anawards banquet was held. At this time the scholar-ships were announced. One boy and one girl received$2,400 scholarships to be used at universities of theirown choice. Six boys and two girls were given $400scholarships, and $3,000 more in scholarships were dis-tributed. Their scientific hobbies and experiments weredemonstrated by the youthful winners on Saturday eve-ning.

After a luncheon at noon on Saturday, leaders inscience discussed with the boys and girls the opportuni-ties for service in scientific research for war and peace.Dr. Leonard Carmichael, president of Tufts College anddirector of the National Roster of Scientific and Special-ized Personnel, and Walter J. Murphy, editor of Indus-trial and Engineering Chemistry, participated.

Lectures of the Science Talent Institute began with a

program on Friday evening during which Dr. Samuel G.Hibben, director of applied lighting, Westinghouse Elec-tric and Manufacturing Company, staged a demonstra-tion of "Lighting Tomorrow. "On Saturday morning there were three speakers:

Dr. A. N. Richards, from the University of Pennsylvaniaand now chairman of the Committee on Medical Researchof the Office of Scientific Research and Development,spoke on "Medicine in War and Peace"; Dr. Mar-garet Mead, associate curator of the department ofanthropology of the American Museum of Natural His-tory, answered "Can Women Re-make Our World?""Navigation in Emergencies " was discussed by Dr. BartJ. Bok, associate professor of astronomy, Harvard Uni-versity.At the fourth session of the institute on Monday morn-

ing the speakers and their subjects were Dr. W. C.Lowdermilk, assistant chief, Soil Conservation Service,U. S. Department of Agriculture, " Food from Soil "; Dr.Marshall H. Stone, president, the American MathematicalAssociation, "New Steps in Mathematics," and Dr. E.U. Condon, associate director, Westinghouse ResearchLaboratories, "Frontiers of Atomic Physics."A Nutrition Luncheon was held at noon on Monday

to demonstrate new methods of feeding fighting men andcivilians at home and abroad. Dr. Henry C. Sherman,chief, Bureau of Human Nutrition and Home Economics,U. S. Department of Agriculture, spoke at that time on"Trends in the Science of Nutrition. "The afternoon session on Monday included Pin Chuan

Ho, professor of physics from China, who discussed " TheFuture of Science in China"; Dr. A. Allan Bates, man-ager, Chemical and Metallurgical Department, Westing-house Electric and Manufacturing Company, who re-viewed "Advances in Metallurgy"; and Dr. R. G. Robin-son, of the National Advisory Committee for Aeronautics,who spoke on "Aeronautics."A special Educational Luncheon Conference was held

on Tuesday, March 7. It was attended by educators in-vited from all parts of the United States and the dis-cussion centered around the methods of selection ofpromising young scientists. Dr. Morris Meister, prin-cipal of the Bronx (N. Y.) High School of Science, G.Edward Pendray, assistant to the president of Westing-house Electric and Manufacturing Company, and Dr.Harlow Shapley, director of the Harvard College Observa-tory, led the round table discussion.

The Annual Science Talent Search is the joint effort ofScience Clubs of America administered by Science Ser-vice and the Westinghouse Electric and ManufacturingCompany.

ITEMSNOT concentric circles but complicated ovals, or even

curves running off the paper, should be used to correctlymap on a flat surface airplane ranges of 500, 1,000, and1,500 miles or more was pointed out by Professor EdwardKasner, of Columbia University, and Professor JohnDeCiccio, of the Illinois Institute of Technology, in apaper presented to the New York meeting of the AmericanMathematical Society. Concentric circles of a spherecan not accurately be represented by concentric circles ina plane. "A map is not a perfect picture, but at besta systematic caricature," Professor Kasner stated. Thesurface of a sphere, or any part of that surface, can notbe mapped on a plane with exactitude.

LARGER iron ore deposits have been found to exist in theWest than were formerly known. It is now believed thatour local reserves will be sufficient to supply for the dura-tion of the war the iron and steel furnaces with this im-portant ore. Deposits containing more than 150,000,000tons of iron ore, vitally needed for war production, havebeen charted by the U. S. Geological Survey, this work insome instances being supplemented by core drilling by theU. S. Bureau of Mines was recently reported by Dr.Charles F. Park, Jr., and Ernest F. Burchard, of the U. S.Geological Survey, to members of the Society of EconomicGeologists and the American Institute of Mining andMetallurgical Engineers. The largest of these depositswere found in California and Utah. Because of the re-

moteness of transportation facilities and water supplies,not all of this ore is immediately available.

VOI4 99 NO. 256710

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ASIA'S LANDS AND PEOPLES. A Geography of One-third theEarth and Two-thirds Its People

By GEORGE B. CRESSEY, Chairman, Department of Geology and Geography, Syracuse Uni-versity. McGraw-Hill Series in Geography. 585 pages, 7 x 10, 250 illustrations, 100 maps.Textbook edition, $4.50

The product of 100,000 miles of travel in Asia and of two decades of research, this encyclopedicand definitive survey by a recognized authority takes its place as the standard treatise on Asiaticgeography.

Asia's Lands and Peoples is a comprehensive, readable analysis of the physical environment andhuman problems of Asia, with special emphasis on China, Japan, the entire Soviet Union, and India.It is the first volume to approach the geography of Asia from an American viewpoint, covering thesubject from the beginning of our interest in the Pacific in the days of the clipper ships to our pres-ent relations with the countries of Asia.

The text contains a wealth of data, with 1941 census figures for India, 1939 populations for theSoviet Union, and the latest prewar production figures.

MILITARY MAPS AND AIR PHOTOGRAPHS. Their Use andInterpretation

By A. K. LOBECK, Professor of Geology, Columbia University, and Captain WENTWORTH J.TELLiNGTON, Department of Military Topography and Graphics, U. S. Military Academy.257 pages, 8j x 11, 307 illustrations. $3.50

In this new book the authors meet the urgent need for an authoritative text that provides in a singlevolume a complete yet simple presentation of the fundamental methods and modern applications inmap reading and the use of air photographs.

Basic principles and present-day techniques are described clearly and interestingly, with stress uponthe habits and mental attitudes needed in fine map reading, such as the value of a good memory,power of observation and judgment of distance, time, and direction. The student is shown how tovisualize and understand the landscape depicted by the map, and is instructed in the common useof air photographs.

Send for copies on approval

330 West 42nd Street, New York 18, N. Y.McGRAW-HILL BOOK COMPANY, Inc.

MACH 10, 1944 SCIENCE-ADVERTISEMENTS 11

Aldwych House, London, W.C. 2

12 SCIENCE-ADVERTISEMENTS 256w

6^_

Bacto-AgarBacto-Agar is a purified Agar prepared from

domestic material. In the manufacture ofBacto-Agar extraneous matter, pigmented portions,and salts are reduced to a minimum, so that thefinished product in the form of fine granules willdissolve rapidly, giving clear solutions.

Bacto-Agar is distributed only for use inbacteriological culture media upon propercertification by the purchaser.

Bacto-AsparagineBacto-Asparagine is a purified amino acid

widely used in synthetic culture media and in thepreparation of tuberculin.

Specify 'DIFCO"THE TRADE NAME OF THE PIONEERS

In the Research and Development of Bacto-Peptone andDehydrated Culture Media.

DIFCO LABORATORIESINCORPORATEDDETROIT, MICHIGAN

MINERALIGHTULTRAVIOLET LAMPS

ForScience and

Great variety oF models.Write For catalog

IndustryPrices $24.75 up

Prompt DeliveryPHOTOVOLT CORP.

95 Madison Ave. New York 16, N. Y.

Our devotion to an ideal has beencontinuous for 23 years.That ideal has been and is wrapped up in

the word DEPENDABLE.The highest standards pertaining to quality

and purity are observed in the manufacture ofCOLEMAN & BELL products.C&B Analytical Reagents conform to the

specifications set up by the Committee onAnalytical Reagents of the American Chemi-cal Society.In addition to the common items, rare com-

pounds for special analytical procedures areavailable under the C&B mark.

The COLEMAN & BELL Co.,Manufacturing Chemists: Norwood, 0., U.S.A.

A complete line for clinical laboratories de-voted to all branches of chemistry, bacteri-ology, hematology, and parasitology. Tested'and checked in our own clinical laboratqries.Purity warranted. Our facilities assure promptshipment of large or small orders. Inquiriesinvited.

NEW CATALOGReagents catalogued alphabet-ically-also according to sub- NOWjects and techniques, plus med-Rical reference guide. Catalog READYcomprises full line blood test-ing sera including anti-Rho CR0anti-M and anti-N; also re-agents for Wassermann, Kline, /.and Kahn tests. Write for your PDP,copy. FREE ON REQUEST.

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12 SCIENCE-ADVERTISEMENTS Voi, 99, No. 2567

MARCH 10, 1944 SCIENCE-ADVERTISEMENTS

HEXAGONAL BASES

opt alt Prez 9#adae4d

Chipresistant fire polished rim. Co nvenient pouring lip.

7~~~~~~~~Renforcing bead (Catalog No.

3046 only) prevents breakage.~~~~~~~~~~~Esl red Wht FildoIE

TIME RED Graduations.

I4LL sizes and types of Pyrex brand Graduated Cylindersand Hydrometer Jars are now furnished with the new

Hexagonal Base.This new feature gives greater stability and prevents

rolling when cylinder is in a horizontal position. Pourout is

not only formed for convenient pouring, but is coincidental

with a point in the base. Thus, should the cylinder be upsetthe pourout will not be the point of contact.

An exclusive feature of "Pyrex'" Cylinder No. 3046 is a

reinforcing bead near the top which prevents breakage

resulting from upsetting. Pourout is to the right.

Fabricated from Pyrex brand Chemical Glass No. 774,

"Pyrex" Graduated Cylinders are supplied either with

LIFETIME RED or white filled graduations.

These new features of "Pyrex" Cylinders and Hydrometer

Jars are available at the same economical prices as before.

Consult your regular laboratory supply dealer.

While hexagonal bases are now considered standard on all cylinders the rightis reserved to ship round base cylinders until present stocks are exhausted.

13:

14 SCIENCE-ADVERTISEMENTS VOL. 99, No. 2567

How Americans Are Kept in Fighting TrimOn some South Pacific island,in Africa, or on our northernbattlefronts ... wherever there

is a force of American soldiers ... you find a medicalofficer equipped with a microscope.Bausch & Lomb Microscopes follow the flag, over

land and sea, to help keep your fighting sons in fight-ing trim. Medical researcl . . . and the routine check-ups and analyses that must be done in the field ... are

a vital part of military preventive medicine. Throughthe microscope the Medical Corps knows of the ene-

mies . . . disease and infection . . . that lurk behindevery battleline.That is why, in the Bausch & Lomb plant, you will

still find microscopes being made . . . thousands ofthem . . . for microscopes have become an essentialto American fighting forces as have the gunfire con-trol instruments, binoculars and aerial photographic

lenses which Bausch & Lomb also manufactures.Microscopes are typical of the many Bausch &

Lomb optical instruments that are performing vitalwar duty on the home front ... in the industrial re-search and control that speed the production of thetools of Victory ... and in the medical and scientificresearch that will make it a better world to whichthese boys will return. Here again optical science isseeing it through.

For Bausch & Lomb Instruments essential to

Victory-priorities govern delivery schedules.

BAUSCH & LOMBOPTICAL CO. * ROCHESTER, N. Y.

ESTABLISHED 1853

AN AMERICAN SCIENTIFIC INSTITUTION PRODUCING OPTICAL GLASS AND INSTRUMENTSFOR MILITARY USE, EDUCATION, RESEARCH, INDUSTRY AND EYESIGHT CORRECTION

14 SCIENCE-ADVERTISEMENTS VOL. 99, NO. 2567

MARCH10,1944SCIENCE-ADVERTISEMENTS 15~~~~~~~~~~~~~~~~~~-

IMPROVED INFRARED PLATETHE EASTMAN TYPE 1-M SPECTROSCOPIC PLATE has recentlybeen improved to give it higher sensitivity and greater contrastwithout increase in the granularity. The maximum sensitivityof the plate in the infrared is at approximately 9200A. As inthe case of its earlier form, the plate should be hypersensitizedbefore use. It is of particular interest to astronomers and physi-cists, and to industrial spectrographers for infrared absorptionmeasurements.More than one hundred kinds of Eastman Spectroscopic

Plates are available. Their properties are described in thebooklet, Photographic Plates for Use in Spectroscopy and As-tronomy, Fifth Edition, a copy of which will be sent freeon request.

EASTMAN KODAK COMPANYResearch Laboratories Rochester 4, N. Y.

A convenient and versatiletiming device which econo-mizes manpower and currentin controlling operation ofelectrical devices within Itsrange, either in the plant orlaboratory.* What the unit does: * The unit consists of:

1. An electric clock with full size second hand.1. Will start or stop any electrical device at a prede- 2. Indicating dials with individual knobs for setting de-termined time within a 12-hour interval. sired time operation.

2. Will start-and-stop or stop-and-start any electrical 3. Device which indicates "off," "on" or "set" positiondevice for any cycle of operation within a 12-hour of unit.period. 4. Mechanical interval timer.

5. Supplied with cords and plugs ready for convenient3. Equipped also with a spring wound interval timer connection to line and load.

which will sound a gong to indicate any interval 6. Will handle loads up to 1500 watts and will operatewithin 60 minutes. only on 110-115 volts, 60 cycle, A.C. current.

Its use in mechanically shutting off and starting ovens during the night so that no delay is ecperienced inresuming operations in the morning Is one of the simplest of the many useful functions of this device.GR-1001 Electric Time Switch Unit Complete as described $35.00

THE EMIL GREINER CO.161 SIXTH AVE. NEW YORK 13, N. Y.

MARCH 10, 1944 SCIENCE-ADVERTISEMENTS 15

16 SCIENCE-ADVERTISEMENTS

Spencer Microscopes in use in an Army Laboratory. Official Photo-Lowry Field*

The Greatest Health Crusade in HistoryHealth is the first prerequisite of a

soldier. Keeping him healthy is an es-sential ingredient of Victory.

Since World War I medical sciencehas crusaded relentlessly for greaterknowledge to insure better health. Thesuccess of this crusade is resulting in an

army which is far healthier than any inhistory. Of equal importance is the factthat the nation behind our armed forcesis likewise one of the healthiest whichthe world has ever known.Today, as for over a century,. Spencer

Microscopes are playlingan importantrole in both. medical progress and ap-

plied medical practice. Greatly increas-ed production facilities are in operationnight and day to meet the unprece-dented wartime needs for microscopes.

Spencer LENS COMPANYBUFFALO, NEW YORK

SCIENTIFIC INSTRUMENT DIVISION OFAMERICAN OPTICAL COMPANY

*This, of course, does not constitute an indorsement by the War Department or by any other Government Agency.I ,~~~~~~~~~~~~~~~~~~~~~~~~~~

16 SCIENCE-ADVERTISEMENTS VOL. 99, No. 2567