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Council for Tobacco Research

Outline of Topics to Be Discussed at Research Conference to Be Held on November 22 and 23, 1955 [Details on Subjects Needed to Be Discussed at the Research Conference]

Date: 23 Nov 1955 (est.)
Length: 40 pages
CTRMN028110-CTRMN028149
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I M G to tae yo.cl'ae carelr.ox.nie .. ._'/: , _. .. _0.f-tte SLUdlos ". y.rlmenta: Caoc.ra :n La Doratory Aaia.ls . C~wa ;,arclnQi.ns 3. C^e_:cal Inluctlca of Canosr 1. wbat 1o oano.r! 2. Gs.ro1 oaS.nlo sub.taaoa. 3. l.boratorr tost s+.tbsrls for oarolae;sns. . 4. Co-:.aroin.Q.ns aZd Aati-Ca»Snopas.. (Ca•no.r Ind.wtioo-- . C. FYp.rla.ntal Can.ar Z"Yha ,as.IaLts['Si ]ian. :., lat.s 14-Sp 114 iYyerlsatal .ort la our Ll.ra~ari.i,.a~sali~l• earvicot~sai. - rabatan.a .h Ln. os.basiiaa~rs+ta~ta._at~p.r~:.tab..oa,_aod•iiiir.tt... A. O.naral Oeaailanati:a~ =' 6. Cig.r.tts Tap.r 1. Cee.lcal findi nts. 2. iCologieal findints. C. Cigo r.tt• 6.ok. 1. :.A.al: al finding. 2. aolodlaal flaQinss D. *~-:.:jor 3lolaetcal T.stiot• 1. ;es.jlts of ,ey*tltloa of tte Gr.b+n-'Ifod.r Lxp.rie.nts. 2. ;e.ults of er~.rls.ntal work r1tD elear.tt.a of a sDeol.l formula. ~s) ':st.r e::raet.C ciear.tt.. ~D) L snd Y clear.tt.s. _ ;c:::s Ta a: DISC:7SSiD J.T .121. :ARCii C0VL}M?CL ' TO b: eii:.D CG~ ;:C"!i 'BM P2 hJiD 23, 1956 REG. t40.ss-"' NH J. :f'octr of seot* cmd.-isat.s on r+bblts. +. 11c.nct in fa.or of eo-carclno:.ns Sn elZarette szoke. 5. Ctr.er .t.dlts. rett. Sao[e. ! 4 028110 CIR 11
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11 : ..i.t .S4-iA. .. :?.ctrcr. :.adi:.tiol and Aadlatlon fqulpawAt. ! . _ ct- and •yera ai~c ;eneral 'slectric Cor.tr&ct. ' _. t o6s :,f ,rdjclni Organiaa Content of Cisarottss. 1 . .rf:nit!ona of 3terllitr. 1 :, Conp«rlrcn o' test eet:.ode for prsaence o' oreanlaas `{. . 'ow '.ec:rcr.s ,s:e :1.'s. .:as assunar.t :ransfcrasr and '•:annor in ~c1cb It tlu,cti: i I F. ;;scards Maocai.d v1tD ths Jss of tt.e naNonant 'iYaaaforoer. ~ 1. tiow thors are taksa cars of '. Fag.a ib-S0. V. Pres.nt Status of Cmplstion of Vsotron Gaasr.tor. disoussioa). a. Coh.rsat tobaaoo Striy. 1. Yw CtS Tlaat 2. 010 CTd ?laat 3. 2agrosss+snts ic Guar Oua-:,hosrlns Sh.et 4. IIss of Proprlaaa G1ico1 1c CtS Sbsst 5. Dss of Cassic as a SiaAsr ln CT3 bb.sts Mt lo wr i t B. F2usioal Propertiss of :oba0oo :.ffsoting Ciecrette t:raness C. FnJslcal Properties of lotacco Aelating to Or71nb ?roDlsas D. :'r+ataent of 'csight Stsza ?ages C7_^2 VII. She :.ar.d Sltj tioL .. ~. V. :.efe.lne's `neDorts. 5. =. J. 'and's :;ewe C.nfere:~zs 1. .~ur resL;:ts witr. azzo:ilum p.-rsulfate. ~ ~ ~ ~ Cj. ~~ t-ItA 0 4
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+ l _~ii cf :ork fert.i n ne IQ t~j oss 2aro1donaie j~qj~ti _ yI crstta  e.rr r.ov st tne po)ni in our vorx oonoornlag tAs posaiLla taroio -orio ua - r . , ... . .. ...t.. .,.nk. vn... 1t ..a+. fn I - . .w...ww.4 .._ .- --'•--. ---- •' r' -* ., c.ate, t~ tr; to e.alusta our proersss and to pl.ac tns •zt.ot aad '.iture work. r. o^dcr to insurs tGat tbe •Zparl.ent•al vork of tAtl laborat•ory Sa ecnRlderet :n !tt cnrr.ct parspseti.s; and in ordar to lnsura tt,+t tro necessarv baek.ground inforzatioa for Drop.r lntarpavtation is fraalS ]a aind; ths first part of tbis rvvi.v ttlll ba larot.Q to d....lopltK soa of ttis bac3grocnd Safos•aatioa. yo att"yt vill DU tada,P raiw tAs ooasplats 11t.r+turr of obralot Sndaation of eaao.r or~tba 1ltirrtnr. Whish taads .::.r: .. . - to ooaa.at tts a.okJod of +ipratlaa t• t2sia partitslsr pmDlao. onl.y LAe r.a4)•ts of tboaa rorks Uhlah~:as, ta!-l.ar aa .t3atj~roLlaa at btad .rill ~s ' . ~ _. 1+ di..usaad aad tDio oa1l t•o'tttis ssttat i..4a0'a.3~~1Z* pria.a& tbs-ser. • gan.ral.l.y aoayt.l tA.oris at. absi.al~iartiaoC.aiaia, •aoe.• af t.Lr proDls• and t.nhalquaa of taati.nC and ltaatif.yl.K isarefooisna, aM oS soir.a tb• . . . .. ... • .. . .: . . . ., . Tb. ascood part of this rerivr rill b. l..ot*4 to a tnaaary d all of tho rort trLiob Aas L.an dow bar+ ao,d at drthur D. 1,ittla, Ico- test it oonnaotsd ritb tCa lunQ c+oo.r DroDla. Spla auasary rlll iaolud.: (a) Rssults cf att..pts to lsolsta aad SdantifJ oaro:noQsnic subst•anoas in ths secte fros cidarette paper, tobaooo an4 ol:arettes. (b) n.aults of rraaow for towid.rrlai alsaratt• ssok• as a po.*11U wvioodaa. at aupts to rod:fy the content of esrtalr fluoresoent substanoes in payer and totscco Ty addltit•es. (a) Re.ulta of long ranp• and hort ranae riolorucl Testi on vrola ciesrette eota,ppar soks and •arious fraetiene -scr.. C TR HN 0,26 11 da'
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a J:r A no ~.:~ .. .~ .' ~. ® I ® ® m ® ® ® ® 8 7(t s~cCs ni UU I. - AackaNaA _..~ ~ :r ~T,oYe a Carcir.4rsn1 _ '~t1ca! JLu61ea ?r% recent ye.ra tl,ere raa been a aGarp Snorsase In tbe nuabar of e_ c.see cf lur.e cancer. :`rrs ia soae Slaatr.sasnt as to bor sucb ::.crc.re is due to better diaenocis and to tne :ncr.ased age of the :u.:.:::':. :.orever, tt eeems to be rat:.er gen.rally accepted that t:.era a r.A? ::.c. .:3 :r, :uni canoer lncid.noc. :.a a rea:lt of tiis inorease In luzg oono.r Sncld..noe a nraber of ~ stuclea 1a.e been aade in an attaapt to find the oausative aCmnt or ai.nts. ~ Sone of t'ese studies ba.s indtoat#d tGat o.rtain oocupationa soea to laad to an iooraas.d risk of luns oano.r. Sbe numb.r of parsoo.a enp.W in tD.se occupations Is not large •noUgh to ao.omt for tLa lat>: oaacar inarsas.. A nuibsr of oa.aosr alinioians for a 1ec.j tLe Lavs Lala the opinion ® tdat tb,ert is a olos• oonnrotioo batrsan Sn+r+s.ilu lnnj oanoer ineidacoe and inoreasin= use of eidarett.s. Easults frwa nusrrous atatistlal atudies of tr.is problem La.e boen publisd.d. In •ssentlally all of tn.ss studl.s the autbora report.d an appar.nt correlation betreen lua: oa.ncar incidence and •soeeai.e aao•Ling. riaay of the r+ports d1s.iree as to the a=teot of ti.is oorrelatlon. vost of t-.ese studlee wre of tne retrospective or •bae.kvard rorklr4• type. In tGis type of study the asoki% habits of a er:up ot subjects wto have been diaQnosed as lung oanoer eloti=. is coapsr.d vitb :.".e saoklne habits of a control srojp rno do not have cancer. Tzsae s:.idles te':d to s:or tat t'.ere are more non-amok.ra In :r.e u:uffected cor.trola t-.en In tt.e cancer ezroup and that t'.ere are .ore beaey s=okera in tr.e ear.cer group t^.an in tt.e controle. 2r.ie type of st.4y Ss usually m.wde on a rel-t:.ely emall numb-r of subjects and la alyays .ub;ec: to :-.e er:t:c:sl c+.' be:,; a.aall non-represantatlea sasple of tbe popula:ion. 2:~ere r-& s ~ ® W B `;Z~ M ®~~ Attf•r' copy CTR MIN 02.B 113
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® . 8 AMA n A a 0 ® 0 ® ..' t••en eh relati.ely l.rie perosnta`s of non-saokera lo tb• oanosr '' _'.a,-.osec not sooet`•aes a ratl-er ..; :.' acoint ssok.d a:.d uawlly a•ery oea6er or f:e-. ,--:r :.1 tory of t-,• subJsota. ::.e c:1sr type of atAy vhieh tAs bsa:: aada 1s tne prospective er •: or:ard lookln:• t1Y.. In this type of study iarda Rouys of people are intereler.d as to their ssoticg b+blts aa1 other yertiaaot SoSoraatlor.. Ttelr sortality data is tbao atudl.Q to dataraloe the rvlAtioo batveen cause ot deatD and asoklog babits. ?roay.etiv slsdl.s of thic :,atur" ar. aose- _a. :.r cajare a larea resldual artor and evin though tna statlstioal '.. .^ sed s..m to gi.• s1:niflcant results twre ls -r t '.:.e c•r.fiae.,ea :Smlta of t:.e res.A ts. Otter erltleisms •.. •..:r :y;e Df study are t:e yo.elbility of con-oDject!vSty vhat fr..r of objaotioaa ait 11as thaa tbe r.trosy.otl.• atudi.s. H.vw.ar, t hs •al l Qi tT • f th• r. s.1 t s frw aip t7•ps sf rtu0.f oy bo atri ou aly at f.o t ed ~ ® ® ® bf thr loterrl.v taobaiQws ss.e6. Ooo of the rjor Qls&d.antites to this kioQ of etodf Is tb+ rslati•all loa>t tise r+Qn1r+Q to pt results aM t.bs eooooaitaDt difTloaltf •eoouqte"d 1D k.e.Dias track of ttv ctLanges ia place of resid.noe, ooovyatioo and saokios bablta of tba subj.ets. Th• results of a prospective studJ of 24,389 oa1e physiolans, ttirty-fi•e years old and ol.d.r, 10 the Uait.d Lio.adoc. and results to date ot a stud•y by tbe A.erloao Caaosr Society of 187,766 a.1ea, SO y.ars old and older, in the Un:ted States se.m to support the contentloc tn.t t..ere 1s an 1ncr.ased rlst ;f lun1 eaaoer aaont nea.y saokira. Taken by tr.emsel.ss t:..a• studl.s tend to Indlct sZoYlcL.; as a n+ajor ca.r.e of 1ung cancer. noveeer, certali laci of qwntltatlve a;-.ece.;t Di:ve:n ;r.e •arlous studies, rural-urbaa cancer rate ratlos acd ::e stb.ence n.' decreas:na i..a:e-female ea:,cer rat• ratio• te:.d tc ln.lci.:e : at at...r .'b : :ori 3ay ~ ry vell De tr.• sa)or =nes. ® 0 0 i-::- -~--=-- ® Y t-r i' i''. t i N 02-6;. .i. °T•
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,. y _ . - CR nc.r J,n j.aDoratory "mis -:r :.er- 'Sfty years att.spts h+ve basn aadi to produoe oancsrous -_ F ter.: anlr.r;s by aub)setl<<s thsn to dlff.rtnt trsdtasets e. )erlved f:oa tobacco. :Lsse anl•aal •xpiriasnts rer• flrat vrre b..ng aaos that the use of tobacco was r-slat.d to - ' 1a, t~:wue, routti .nd larynz ivnd aa.e ba.n carrl.d on In : r. : r.cr.:ers 1n reosnt years. 5vse of tne substances vt.iet :aee D.an ~rC ••rc .ar1 uc tobacco •=tracts, tars prod.uoed 1n the destr.ctl+s c1F::::a:ion of tobacco, and •ariously tryat.d saoLa residues. bos,e nsjccessfu; attempta were a+ad.e to indoos lung oao4.r C7 allovin: nice to :r.hale tobacco uoke wbioh w•aa lntrodncd 1Dto thsir oat.s. C'nt11 tse work of yyodar and Orahaa was ptiblish.d ther. Aad b.aa no genera117 ajospted prodaetioa of e.anesr la laboretor7 an.lmals E7 " of these tr+ataenta. AltboW as1 o+oaalotrl tuaor was produo.Q thay wsr• usua ay oonaider.d to b* etthar p.pillosas (ao^ -- - srovs tu.ors) oT spontan.ous eanosrs in susssptibl• st»ina of •nisals. by palntltg th* aSa.sd backs of laborator7 aioe with an ao.toos euspen.lon of ol:ar.tte saoks r.slaue, YyDAar and Oranaa wer• able to produoe ca_rolnosas ln 4-4% of the anla;ls. In taras of body welght a•nd fractlon of norail llfstia., the doss 8110 Lad lso,gtn of treat.ent of thea. slce w.re pro:abl7 sQul+alsnt to the saoL'ne of about 7 cartons of clbaret:ea a day for !-0 years. This eo.pletely u.nr.allstic doas vould b• absurd for ardlnary toztoolo;loal studies. rioree.r, tr.er• are theoretioal r.as:ne Y J t~.1s terrlf1oa11y larQe doss would not 1n.a:ldats the ezpsrissnt. ':.1s w111 be dlscusaed further :n the fo11ov1nQ s.otlons. 3. Giovr., Carclno sns :n 1939 aA. }i. noffo reported t:,at he found tr•e Yncwr c.rc:noLer, r-ns :r. tr•s dist111at1en ,)roducts of tooeceo tar. i%c"c ~ e t.~ :'l1u::~n on t-:e basis of ultra.lulat and fl.:orescsr.t spcc:ra. a:;e-;.•.s :'~ repeat noffo'a wort were unauccesaful. I
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. : ;. ~ _. ® ® ® ® ® © a ~^- ® 'n and 19tL Lef.alna, I,l.ord and Cardon, a~ Lladaq and o.1ng founP in tars oollect.d froa DurnlnQ r, or ci,;arettoa. A•l.ord and Casdon Durned olbarette cc• ;. _ elaaa tu:e and condene.d t"e produot• of oomDustlon. !'er:-e •d ci,*aret:e p4pper and used the aame type apparatus. iOk e~ a. -o:y•r e tc.er reFlac.d t1e toDaee~ to oigarettea .•Ste ahredd.d c:_. .. ;.ar•r rr used atan9.rd eliarettes. Tnese 'paper' cliarvttea and ` r r-b.lar c:,; rattas rere amoked on a amokind darioe ai1d the taoke was ;D^enaed. 'ce ldaatification in eacn oaee vaa frca ultra.lolet and !y.ioreecenoe spectra. TL• apeotra.l our..a of Llnd.ey and Cooper hato not De,.n puellaned and tne cur..a of Lefaain• and of Llrord ar,d Cardan ara not u:aaiDlsnou.. TLarm ia no publ.ishal ..idana• of atyooe ba.inj a.etuaW a.paratod this ooaponrd In ita par• fora froo oi.gar.tto aaok.s r.aidnea. ~. ~ The appar+ntly W1d.. ays•.aQ imraar• of luat oano.r Snold.ow 1 eti..as to point to ao." aan wtiv+ &g*at or agent• rnioL vould .zbiIlit the fa$owrlag props•tlaa: a. SosetA.ing inbalAd into th. lussa. b. Sos.tGing .rEioh a gr.at rny people art arpos.d to In the Ualted Stat.s, Ln:Lnd and otWr parto of the world. o. So.I to vbieD peopl• have Dean Sneraaeiagl.y o:poaed to In th• last aetrral d.cadea. 6. SoaettanQ to aAleh aore axn than voaen ara as?oaed. ® W sa a. So..tr.ind to ve1cL drell!ra. urban dv•llera ara nore ezooeed to ttun ru.ral Cn tl.e basis of the above properties tr.e fo::w:r.e f..tore .:u:d De •ievad with suapioicn. a. Co-Duatlon ~eea from coal and o11 furnacea. b. *.xC.au.t Cseee fro internal conruetion en,;ines. c. Asphalt dust froa pa•ed roala ar.d otreeta. d. :"1 . r•tte amo'e1na. ® I. ® ® ® ® VTR Hf44 0~'B I 16
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- 6 .: ;'r.e ;,ubllah.d at.tlatlcal atud].s tand to ledist oidar.tts ssok.i.r *:o-over, tr.e rura1/uru-. ratio and ths laek of a tios trsnd in :r S.,c' •e "^.csre cn tne siln of laboratory aniuls - C. .' a c.wr. carclnove,i C.r.e beon rYport.G Sn tacL. ,r.j•e iytc: :ay,r prcducea surr .plderul :el:.. :'nder norcal c:rc,_=s:.. .<< 10 -eAr-e.. For lnota:.c., v^en saall portions af tr.e akln art r-- e adult nrganl.a naa Lesn foraed. Tr• d pacttl of tlasus tc rrov is no: lost vren tne ac.:: Rta;e tr• .'urtrer e-rortr. of the tlasusa slo.• dovn and ultlistely ce.e.e nd tr.c oalltd dAfferant/a U on. Aa tns saxlaua dadree of dlffer.nt:atlon 1s at:alned, tis* tLat tRS.s tlssues ars ds..loplnQ lntc pn,vaioal sntiti.a tney ar+ also d.vslopiag sp.oiall:ed pr4alolo;lcal function. TCls procsss of ds•.lopltq dlvergs^t ptusloal form and p*siolodlcal funct1on ls often d..elop lnto di.tlngulsLabla .ntltlas and art oallsd tlsauea. At tte aaa Probabl,f the sost sar.orri nar~ and sost lntrioats pLanoasc,on in ru tur+ Is tbs ordarly ds.slopssat of tbe li.ing snltlosllalar orgaaisa. Tms dr+.loposnt vhlob starts froa a ala.tla f.rt111sad *" oell proo..da tdroagb raaJ os:,l dS.iuoaa to 'baild cD prl.sdtl.e gsrou'p• of oslls with •a.rfiag a].strlbutloo, app.araaes,aod fnnotion+l pot.ntialitl. Yltfl contiausd growth of •aob grou,p of oslls, their saparats o~ar.otsriatio. dlargs •or* and aocv froa oac4 otDer and beooaH inor.asingl.y aocantuat.Q In each group. %M ss groups of oslls, ritb oontlnued o.ll dlrlslon, discuss brlsfly just wt6at a oanoar is. 2his will be don. In tbe n.zt few paragrapha. and tu• e•1tc'_ '.-.tuc:lon cf sancer and ylolotilcal te .. Yhat 11 A anosrl before procs.ding further lt volld p.rtupo bs a good ld+a to ' '4 1 'C1
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® 1 -e C"A~ I a U ® ® so ~ ® ti' •a; s s:_e DreaLdov:. cf tlssue vlth a auDs.quent r.gan.rction Ly :ae radeneratlcn rsachea the :wzl.um allovaDle :.a- :terie:le r.f tne rdult erianlsa and t:..n esasas, TGa ::a:::, .' a.; t1.c . la usually confined vitGln dafln_te 11:1ts -::r ~:c:. are exerted oy ::.e oreanlaa. From the Lcglnnlnd of call :::^ .,.: of ::.e f.rtll:zed •ed to :r.e attaln.ent of tne adult s:,d ero~ ::. o' eac:. tlssue Ss eoordiut.d v1tC :...: o' e.rr± ot:,er tlas'is. Lnd t..ls eoorClwtlon 1. a•.ytr.ntly yintalr,ed ,..r:j;nou: t:e 3reatar part of tne life sDan of tn• or:anlsa. YStE sold a;e' tne rcg.nerati.e c.apaoltl.s of tha tissues are Qad:+ally c1a1n1sL.d at rates vtilca s+ay De dlffer+ot for dlffarsot tissu.s. Th• nors+al •zistsooe of tDa awltiosllu1ar orgsnisa is, tharafora, att.a1n.d by tD• suDordination of tha aapaolty ot the tissaes for growth to tha .aint.oaao• and Dal.n.a of t.La orpnia as a vLOla and to tha indl.ldual parts. Oe,aasiosi117" a sisin• s+a.F trov DaFond the normal llalts oT tDe orpnisa, Lut aa loas as !t rwalns ondar tb• e,odtrol of ths orSaalas it asuallF gTOVa r.l.ti.ely slo•vly. It .ay ultlrataly r+turo to Its nor+al slie or St .ay reach a yoimt of L+.laDes ard not Snorease further Sn slt.. Thsse t.talgm, oootroll.d or.rgrovtLe of tissue ar" oot noroally fatal to the or6anls• as a vhol.. If they yt.ye1ca11y yuaL adalost sone vital struetures vLleh ars oonflned in ae unyleldiag space, sucr. aa the slull, d.atn aay result from ..c:Ar,lcal •ear.s alone: TLe :enera: ;..t•ys:cal aDDearano• of the eells and the ;r,~ alclo~lul functions c: t. sae C.r.lb-n tueors are very a1a11.r to th• tlssues fros vLict :ne) or1.1i,e:e. Ihere Is another klnd of tl.sue srn.;G v:.i.. to aom• ea:eu: is free fro- ccntrol of tt-s ::sanlac. Tn.ie ti;)e -~f Lrcvt_ is Crr .e^:ly ~r- _.c.lted a-A cortlnuous; lt yroee.ds at a rA:e f-r 1n •ice:a : r -. t Tt crocred: vltr.out ceneld.rs;l:n for nelet,Lor:% tlssL:es v;.lc•: It crnpr.rel.ely :n.adre, destroya, anri retlicee. It 1e :aoe;e,:cent :f © W It t..r ~y i'°. t~N 02 6116
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uf tts•ord.niaa •s a rhole and ultlutelj ;.i.ypical app-.rancs of thsse 6ro•tGe •ary con.ld, f ::,e Ls.eloped tlssua 'roc, vlileA tbsy beian; AME - -j-~---- CTR MA 0~261 1 C •• -•. 'ive .'cres cf t:.ese tlUsuss. Tbe eall patterr, of r . 'r~c~ey c.sauerrd, tej ei k eratad, a n d -j rw.lffere.,t:atad. e- sr ~:: r.dr: e c ccordlru•tlon cf tre effected t:ssue vaa .-..tr.. .-.:t, rt^or_al tipe cf ;ro.t' Is t:te r-.• - c•F.!- ~:erl•tlc f t..e .~nrnoaeno^ v:-ac. Ss :,-t: c a-e at cancers. o.novn cs cancer. *,he 2. C.rc^.c: e'.2c 5ubatancet. 'ne observation Sn 1n5, by Perciral Potts, ot tre hiel, lnoidence of cancer of the ecrotui aaong oh.taoel eraps an4 the later cbser.atlon of the L]sl. incldeics of stin oaaoer a•aoag the eoal ta.r d1at111a:1cn voriara in tt.e 19tG century 1.n to aaoj efforts to prdduos oancsr eryeri~.nta:i~. Stls sffort ras not wd.s solalj to saaluate tbe d,a.aeers of SAduatrial Latards but vas ooasidered of utaost iaportancs froa a th.orstlc.l point of •ier. It had not then been astsb_lahad tr.at oanoer could be prod.uo.d by a knovn cb..iul subst..hoe. llu.ierous Sn..eti4ators .-ere un.uooeeaful for acu years in thsir efforts to produce oa:osr Sa er,»r:eental anioals ty eoal tar products. Finally Sa 1915 two Japanees vorkera report.d tt.e successful production of oancers or the ears cf rabtlts by e:tendeG a;,;11.0- tlons cf coal tar. hfter deaonstr.•tlr.e t:e carclno,~enlo property of coal tar tr- nezt lojleal stap vat to attezpt Ssola:ion of tre substance cr oubstanoes vr.1c[: was r+epor,slble fer t:ls property. K.nnavay, Coox, =::e_er tnd o n•rs, 1n Londcn, saparat.d a aaall qua:tity of a yeilov crysta:::ne o-:er'.A1 frr sbout twc :ons c.' coal tar. '-ney lcter yro.ed t,'•s ye::c. -:~r'til te ce :, -Je:.:;yrene. _rene /a a po:e:- t carc_ o rr. f:r t e••.ln of a 6ouF.. +'.aee lnndon rorkers used t',e Carc:tcper.:c , ; (f :rc r~Cet..nce w. ic: tre) to ~r.t as a eind cf :._1~. --.r :. c

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