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Much Ado about Next t o Nothing. .itid llo slight i i i tcaiided! For high vacuum operations present problcnx Ivorthy of the best talcnt. In our first articlv J l o r ~ ercvicws rcccnt devc'lopments; he convincingly supports thc. corifidcnt statenlent that "high vacuum is n o F a t the state of advancenieiit n-hvre the problems of vacuum per se are usuall! tioils of the process. S o longer nerd t proccw is economically or technically urisound nici~clyh c a u s e i t iiivul\Tes t h e use of free air pressures belon- 100 micron?, even i n conjunction with valves aiid vacuum-tight shafts, or triiiprratures ranging from - 100 t o 1000° C." Xorse rt,fcrs t o sonic. vacuum requirements of the atciiiiic, enc'i'g> vacuum distillation arid nicitallui,gy, arid dc rial scalcb applications of high vacuum f o i , d r in penicillin mariufacturc a i d oraiigc. po\vtii~i~ pi,oduction. S u m erous photogritphs and charts accompaii>-the article. good Iisc*kgrouiid t o iiidicatcs t h 1Iorse's paper should pro1 scope of a 2-day symposium scheduled Octoher 30 and 31 t o be held in Cambridge, IIaas. Thc y m p o s i u m , sponsored jointly by the Sational Research Corporation and the =1.C.S. Divisioii of Industi,ial and Engineering Chemistry, is d i v i d d into the> following five scctions: Scientific -1spects of High T-acuum, High Vacuum Engineering, 1-acuum Distillation, Vacuum Metallurgy, and 1-acuum Dehydration. Objective of the symposium is to stimulate discussion among tt,chnical people, ccinct~rned~ v i t l i industrial applications of high varuum, antl attc*iitlaiicr~is limitrrl to thin group.
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Acid from Apples.
til15 Uuf+ a u c ~~ l u t t t . ltulci . l i ub I ~ malic. acid could be scparatcd from apple juice, by adsorptiori 011 a n anion exchanger, a d(2sirable procedure in t h r mnnuf bland applr sirup. On page 1087 of this issw thcly d method for it.; reco from the rxrhangrr. Tho t i ) can be used as a food acidulant for prepaixtioii. \ \ - h ~ ~ t .it.* t ~ pwseric~bis apprwiated niore than in applc sirup.
c t r i d l y h i ~ : i t c ~ t lir, the stBnsitive elt~mentin the rig. c~spc~i~inic~ntal \vi)i,k \v:iinitially inspired b>- t h r desirt, t o i p a dovici~iiioi't' auit t , i i than t h e Pitot tube for i i i w - u i x ~ m i ~ i o\v vcllociticb* : h l J \ \ . ~ ' ~ ( ' I ' . by the. tinit: the) iiire5tigation had t i w i i i , t ~ y o l v c di n t o thcs art i c l i , presented her[,, our revic>n--ci..c o i i ~ i c l ~ ~that i ~ i d its grc,aitast vtiluc. la!. i n the, Cundaniental coritriliutioiis the a ~ t I i o i , sh:id madix t i ) our kno~vledgeof h[,at transmissioii. Itc,sultq ai'e comr~arcdn i t 11 those of previous invtstigations. atid c~i'i:itionsarc d c Plastics Dope. K h a t sulfoiiaiiiicic, pla*ticizc.r.. do tlJ rtBsiii.. is reported by Bergcsn a n d C r a v ~.-tart r iiip on p:t oil R iiuniber of resins is niclaaurid i l l .such t t ~ r n i elongation. water pi$rmeability, a n d flc~xihil . . rat(, the. coiitrihution as c o n t a i i i i i i ~iiitiiiy usi~fuli l i i t a on R siiI>,ii~ct T a l l Drink.
TI^^ iczlIgtila t o \yilicil itivc+tigx?or> \vi11 gll trap it fart i.5 aptly illustrat i d liy ILiii,, C;ul~oi,i:iulr, a i i d Iiii-,*iiii (pagc 1072). Thc,v start i n :i laliiir:itiii,y pt'ntlii)u nicxnt iour sturie.. lx~liin-\ritli espi~rinic~iits o n R 52-foot a c l soqition culumri 3 , irirti i n clianic~tcraiid filled T r i r l i -ilica g(3I. .idrolytion ha5 l x ~ c i iutilizcd for 1 i ~ d r u c : ~ r l ~aiialy& on in pt,(zviou.\vurk. The rc.poi't givc,n t i c , t , ( h i. x n investigatioti of tlit. fr:ictionatiiig c.apai~ilitic.-IJ~' t h i n s y t c . n i oii ~ i y d r o c n i ~ h niixt i i ures R-: :i potciit i:il ~ ) i ~ ) e e for , + largc *tale production. -4 i i ~ i i i i t i c ~ofi ~ concluiiririr : i i ~ '.t:itc,tl whout tli(z r:ip:itiilitics antl liniitaiioii- rii' t h e ,
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