I iiiyself hnd iiiennrvIiiIe rcsiiiiicd m y enrlier work on the coiiversioii of olcic ncid nnd lip n systein ic stiidy of Snbnticr’s rcnction (in \v]iic]i Iwns nssiatcd I J ~ lh. H. Pick), I succeeded in coiircrtiiigoleic ncitl iiitostcnric ncitl, with n prneticnlly tlieorcticnl vicld. As this rcsiilt is of tcclinicnl iiiiportancc, i t \viH IiC: ~~iit~crstootI why I iiiii t cscrcisc rcserve with regnrcl to ~iiil~lisliiii clctnils of iiiy iiietliotl, niiti I will frniik~y ncl;iiowlct~gc dint, biit for tlie nlipcnr- niice of tlie nforc-iiiciitioiietl ]intents. tl fnct tlint iiiy eiitlcnvoiirs Iinre bccii siicccssfii~ woii~tl ii3 yet ~ invc ~ c e i i coiiiiiiiiiiicntcd. I iiiiist tlicrcfore roritciit iiivself \vitli showing mii ip~eq of t11e critdc stcnric ncitl I biitniii. I slioiild iiiciitioii tlint I linve iiinclc n sliort coiiiiiiiiiiicntioii cnrly in Fcbrunry in the iiiniiiiscrilit of iiiy ;\IIIIII~I I<eport for the Jnlirbiicli tler Clioiiiic. ‘l’lii< will, Iiowcvcr, iiot appcnr in print beforc Jiiiie or JiiIy.

The nenr, fiitiirc mist. sIio\v wliethcr tlii! tlifTcrent n t t e l n p I 1inr.c eiiiiiiicrntctl ivill aiirrivc tlie rcli.iing fire of teclinicnl nliplicntioii, niitl wlietlicr we ~ h n l l tJC n l h to m y tlint this rilost fnsriiintiug teclinicnl licoblem in the fnt iiidiistry--as I rriiturccl to tcriii i t eleveii ycnrr ago-Iins I~cei i solvetl. ]hit niny tlic oiitcome of COIII- riicrcinl olwrntioiis be tiiicctw or failure, the fnct t l in t oleic iieicl nntl cvcw less sntiirntetl ncitls t m i be coiivcrtetl quniititntircly into sntiirntcd ncitls will stniid oiit for evcr ns no iiicnii iiioiiiiiiieiit to the work of Snlmtier nntl Seiidcrriis. --

PORTItCOJI I Sc) ?I[ EET I S 0 . The following pipers will be rciid nt tlie iiext iiiectiiig

( I ) Tho A~~tolysntor,” iiii np~inrntiis for tlic direct I3y c. A. Kcniic, JISc.,

(2) Explosires niid the building of explosive fnctories.

(3) Soriie niodcrii clicniiciil plniit. J%y 0. Guttninrin.

of tlic Loiit$m Section, oii Jloiid~iy, Jiiiic 1st :-

estimation of ciirboii dioxide. P11.1)., mid H. Burrown. A.R.C.S., PIi.1).

By 0. Gllttllillllll.

. .. __.__ - - -- -_

Manchester Section. ilfreliirtj hcld ttf Jlrriichcuter ou Fridtry, April 3. 1008.

3111. 11. Ii. CLAYTOS I S TllE CH.\IR.

XI<\\’ C;\S AShLYSIS r\PPt\R:\‘l’US. JIY RAYJIOSII IIOSS, 1II.C.. ASD J. 1’. LEATlIF.11.

---.

C ‘l’lic iiiotliotl of workiiig is I IR folloan :--1!v rnisiiig tliu Iiierciiry retlervoii , t ~ i c iiienruriiig ~ I I I I J n n t ~ h i 0 \ \ ~ e of the conauc~tioiis iiru lillctl w i t h riicrciiiy, n*liicti in iilloacd to t1ow tliroirgh c w l i ~tolicork i i i turn till tlio siiinll gIIiH8 c i i p nre nl~oiit 111111 fillctl. ‘rlic reseruoir is thcii lo\\.ercil till tlic iiicrciiry fnl ln to tlic iiinIk on the iiieiisiiriiig biilb.

- !I’he bnroiiictric prcssiire is iiov rend off in iiiillinietrcs. iiicliiding the tciision of nqiicoiis rnlioiir, siilliciciit wntw for this piirposc bciiig introtliicctl ivit.11 tlie iiicrciiry. l‘lic Ixiroiiieter tube is tlicii sliiit of1 niitl the iiiensiiriiig 1 ~ i i 1 1 i re!illctl wit11 iiicrciiry, nritl the gns to be niinlyscd ititro- tli!cetl into tlic bulb wit1 I)roii4it esnctly to tlic iiinrk nt iitiiiosplieric Iiressiirc. ~o i7itrotlricc t ~ i c gns into tlic reqciircd nl~sorptioii pipette, the iiicrciiry reservoir is rnisetl, niitl the iiierriirv in the c:ipillnry coiiiiectioii t u lm driven forwiitI by t~ie’giis iiit.0 the ciips till tIic gns just rcnrlics tlie tlirce-lorctl stopcock. The siiiiill stol~ocl; is tlicii closctl. ‘Tlic nl~sorbeiit is tlriveii iili by iiic:tus of the sliort riil~bcr ti:I~e, till it fills the 1iore:of tlic t;ili.BThe stolicock in tlieii rcrcrsetl allowing the gns to eritcr the pipette. \YIicii tlic nbsor ition is roiiiplcte the process is reversct~, nitd tlie ails tinril~y swept tliroiip~i tlie cnpi~nry titbe into the niensiiririg biilli by iiicniis of the iiicrciiry froiii tlic ciili. Tlrc iiierciiry is npniii broiiglit to the ii!nrk iii tlic iiirrtsiiriiig l ~ i i l l ~ . roiincct,ioii with tlic iiiilliiiietre ttibc 1i:iviiig Iiccn re-cstnl~lislied. TI10 rcntliiig. iniiltililicil by I(K) i i i i t l tlividctl Iiy the first (“ biyiiictric ”) rentliiip. gives tile ~ierceiitnge nbsorlitioii. .Ihc pipettes nre 1111 lillctl with glnss l~cntls, nnd lioltl nboiit 2fiOc.c. of nbsorbciit. lhc usunl iil~sorlicnts nre ciiiployed, nnd tlie nii~iiionincnl ailiroiin rliloritle soliitioii is protected froiii osiclntion by I i i i l l i s eontniiiiiig wntcr. Es~ilosions nre cnrricd out in tlic iiiciisiiriiig biilb. tlic portion of the gns not rcqiiircd for Ysplosioit liciiig pitswd into oiic of the nbsoolption pipettes. 1 lie wliolc np~inrntiis is RbOilt 50 iiirlies high. niid for coii- vcriicnre of working is iiioiinted on n stnge nlioiit 15 inchcs high. 111 the niithors’ Iiniitls tlic n~i~inrnt i ix Iins 1)ccn found lo I k rnsy of iiiiiniliulntion nncl to give very ncrurnte rcs~ilts.

DISCUSSIOS.

r .

I k . G. H. I ~ A I L E Y coiisiclered tlie nplinrntns Iicttcr than ririy other of tlir Orsnt or IEciiilicl type. \\’lint~leiigtli of tiiiic wns ~ c i i p i c d iii roriipletc~ly csl~clling nir froiii the brillis nntl ciipilliiry tiibps ns dencritird ? He Iiolied the nutliors worild my Iiow they lind fnrcd wit11 vnveliric nnd iiierrrirp in tlic nlisorptioii tubes contiiinip cniistic potnsli.

L k . (4. J. FOWI.EH nslictl ii. with II iiinsiiiiiiiii voliiiiic. of 150 e.r., tho n~ i~~nrn t i i s woiild not eoiiic iiiidcr the s!inie criticisin ns n niiiiiliir nlilinratiis lie lind tlcscrilml sme tiiiic ngo for riiinlysiiig gnses froiii se\vnge. whicli wns nrriingecl to pcriiiit of cxplosioiis bciiig iiindc over iiicrciiry in tlic iiicnsiiriiig pipcttc, birt wliicli ~ ‘ n s iiot cn~iiible of the niiiiie clcgrt*e of fiiieiiess nx tlic author’s nli)inrntns \t it11 regnrd to iitljiintirig the nicrciiry. liiitl niiy dilticult been foiiritl iii o~itniiiiiig roiiiplete explosions wit11 sii,iiZ pcr- ceiitrigcd-of iiietliiiiie ; or, on tlib 0 t h hind. with n gns coi~triiiiiiig n lnrpc pcrcciitnge of ronibiistiblc coiistitucnts. cwi i l t l t!ic voIii~iie I J ~ rcdiiccct considerably 7 (!odd tho ~i~i~i~ i r i i t i i s descrilicd IJC ciiiirciiiciitly iisrd for gn~cs boiled 011 froiii feriiieiitiiig solutions : He conld iiot scc haw the iip1i:iriitiik woiiltl leiid itself to this ~inrt‘ieiilnr k‘iiirl of work.

Jlr. I~oss. iii reply to I k . Fo\vlc~. snid tlint the n ~ i ~ ~ i i r n t ~ s ~ v n s vcrv siiitnblc for l~oilrd out giiscs. \\‘lintcvrr .iiniouiit

tlrsirtd to i*splode it. nir or osygcii coiild be iisctl. coiistnnt voliiiiie re-entnblislied. ni i t l tho niiioiiiit tiikeii rrnd off. l’lie es~~eriiiietitiil error wns slightly over 0.1 er cent. ,* 1 lie iisc of frcsli soliitioii?i, tin rccoiiiiiiciitlct~ by €+ofensor Iloiic, \WLI it tlcridetl t1i~itIviiiitii~;e : 1111 p s r R wcrc SOIIIC- wlint. solii l~le iii niiy soliitioii. niid iiccurntc results coultl 0111 IJC obtniiietl nftcr acvernl nnnlysc~ l i i i t l Iiccn iiindc w i t i t ~ i o wiiiie fio~reiits. ~ r i reply to ~ r . Iitiilcy, n coiii. plcte niiiilysia coiild lie cnrricd out i i i itbout nn Iioiir. ‘l’lio t i t i i s were greiiscd witliiiii ci~~i;lhioii of wseliiiu niid iiicrcurg Uhirli nctcd very well.

\111l4 htkL‘ll. it WIIH IJrOll&$t 10 ~IJll~tllIlt ~ O l l l l l l e . If

- __________ -

New England Section. Jlee/ii:y,lield ti / Uou/oii, J f w u . , O I L Bridtty, -4pril 3rd, 1008. ---

JllL 1’. E. .\TTE,\US IS Tl lE C I L \ I L --- Dr. JI. J. LASQDOS gnw n lectiiru oii “ Old Shylo

I’nlico Printing.”