.'II KM 1ST It Y OF Til K I'ToM A I N I 



mixture- of IKISCS, whie-h, on analysis, gave iv-ults conv- 

 sponding to the three formula' : 



1 2 3 



(a B H l4 N001),PtCI 4 (C 5 H,,NCl) a PtCI 4 (C s H 14 NCl),PtCl 4 



Formula No. "> was tl ..... lie accepted by LlKBUKK'II for 



nearim, bat, according to !>AKVKH, LIKUKKICH'S ne-nrine- 

 salt is not simple, but is a mixture of Nos. 1 and '2. He 

 himself aeeepts formula No. 1 as the platinoddoriele- of 

 neurine, and distinctly states (A nun/, if. Chrm. it. Pluinn., 

 142, ">-">, 1W>7) that nenrine is in composition trimethyl- 

 oxyethyl-ammonium hydroxide. And, according to him, 

 eholine from bile, and sinkaline- from white, mustard, appear 

 to l>e identical with nenrine. 



This noiiieMelatiire of JiAKYKK's was tit first adopt**! l>y 

 WuRT/ and others, who showed that the oxyothyl base 

 was identical with eholine and sinkaline. ( )n that account 

 Sii;i:( KKR, in 18H8 (AnnaL, 148, 70), suggested the re- 

 striction of the nanu! eholine to the o.xycthyl base, and to 

 reserve the name nenrine lor the base whos 1 . 1 platinochloride 

 is represented in No. ">, as originally was done by LIEB- 

 IJKK-H. In 18<l!) LiKiiUKH'ii showc<l conclusively that 

 pure prota-oii, when heated with baryta for twenty-four 

 hours, yields a substance having the composition of the 

 vinyl base : 



The platino -hloride of this bas:- ei-ystalli/e<l in live-sided 

 yellow plates, which, after a time, on exposure to the air, 

 became cloudy ; on treatment now with water a portion 

 dissolved, and the solution was found to contain the oxv- 

 etliyl base. Furthermore, he observe*! that when the alco- 

 holic extract of the brain, from which all the protagon had 

 Ixvn remove*!, is tivate*! with baryta, only the' latter, the- 

 oxyethyl Itase, is obta'ned. Finally, in 1870, WruT/ 

 abandoned the use of the term neurine to designate the 

 oxyethyl bas;-, and returned to the name eholine, originallv 

 applied to the oxyethyl base by its discoverer, Sl'KKe'KKK. 

 Nevertheless, the confusion in the nse of the-se two terms 



