308 



R«t«Ar«h t Drr«lep«Mt Eattblii 



Brltlah'AMrlotA Tobaoeo 0». IM.. 



O^ (Mtport Ho. W).»JT-«) 



SL>»AFT AWP 00WCLD3I0W ^ 



X) It M«a •hom In in •«rU«r rO?rt th«t «»• r«4otloo of a n>ok«r to tbt »tr«n«t* 



otO^t «»ok« fro« * elfu-ttta oould t» *^Jr«Ut«d to th« 4*ount of "•xtp*eUW«* 

 ftlaot^^ln tho nok*, rmthtr thaa to tht i%il nloctlfl* eonttnt. TM« r*Utlon«Mp 

 hat DOW M«ae«nflrs«4 tqr an^tujii nation of fui\^ iMplta of ol(ar«tt«s. 



Altbou^lA ^< ^(B shoM t^^ *«xtraet«bl«*1pl«otlM wid nleotlno )u« «r« 

 elostljr r«Ut«4. tljftr »r« not eo«pX«t»l/ tynongrwui, tn^t It <uu«tted that tho 

 Xtrm *«ztr«et«kU* ni««Un« !• raUlJMd to r«f«r to that pott^l^on of Um nleaOna 

 WUeh can b« axtraotad bf 'O^orotorm fro* an aqutcua aolutloo &C aaok*. 



Tha raaiona for tha r*li^j»«Mp batwatn aaokar raaponaa and ••xtraaUkla* 

 Blcotioa eeotant of tha aiMlM MciUi^bacura. Ur»r%X poaalhXa axpUnatlooa kav* 

 baan eoneldarad and, at tha praaaat tSj», It would appaar that tha Incraaaa* wokar 

 raaponaa la aaaoolatad with nleotlM rMcMM tha bnln aora quickly. If tUa 



axpUnatloB la oorraot, than tha rata oootroin^ at*4a of tha tranafar of aleotlna 



• <S 

 froa tha aaoka to tha brain la probablj althar <C 



(I) at tha Intarfaoa batwatn tha aw>ka aad fha*^aoua iMrfaca of tha 



^"^^ 

 raaplrmtery tract, or O^ 



(II) at tha iBtarfaca bttwian tha aquacua la/tr and tha^C^tt/ tlaa^M 1a tha 

 raaplraUnr ayetaa. . /^ ^ 

 On tha forMf vla«, a saoU with a higher 'axtraeUbla* niaoUn^v*^ b«n«4 \ L 



V. 



