398 



MR C. G. WILLIAMS RESEARCHES ON 









Experiment. 







Mean. 



Calculation 







I. 



II. 



III. 



IV. 



V. 









Carbon, 



34-48 





34-58 







34-53 



34-33 



C 20 



120 



Hydrogen, 



2-97 



. .. 



311 



. . . 



• • • 



3-04 



2-86 



H 10 



10 



Nitrogen, 







. . • 



... 



« . • 



• . . 



4-01 



N 



14 



Chlorine, 



. . . 



• . • 



. . , 







• • • 



30-47 



C1 3 



106-5 



Platinum 





28-09 



... 



28-36 



28-08 



28-17 



28-33 



Pt 



99 



10000 



349-5 



In the following table, the mean of these results is compared with my ana- 

 lyses of the platinum salt from the cinchonine bases. 





Coal-Tar. 



Cinchonine. 







Mean. 



Mean. 



Theory. 



Carbon, 



. 34-53 



34-04 



34-33 



Hydrogen, . 



. 3-04 



2-95 



2-86 



Nitrogen, 



. • * • 



• • • 



4-01 



Chlorine, 







30-47 



Platinum, 



. 2817 



28-13 



28-33 



Action of Iodide of Ethyl on Lepidine. 



Hydriodate of Ethyl-Lepidine. — As it was evident that the process for prepar- 

 ing this compound, and from it the platinum salt, was one of purification, I thought 

 that I should, by this means, obtain nearer results on analysis than was the case 

 with the experiments last quoted ; and the following may be considered as con- 

 firming the truth of the supposition. 



Coal-lepidine, sealed in a tube with excess of iodide of ethyl, and exposed for 

 some hours to 212°, yields a mass of brown needles, which, on recrystallization 

 from alcohol, are of a brilliant canary yellow. They have the same property of 

 becoming red at 212° as the corresponding salt of chinoline, although scarcely to 



the same degree 



. 









/7-111 

 \ 5-595 



grains iodide ethyl-lepidine gave 

 iodide silver. 





or per cent. — 











Carbon, 



Experiment. Calculation. 







48-16 C 94 



144 





Hydrogen, . 



Nitrogen, 



Iodine, 



4-68 H u 

 4-68 N 

 42-52 42-48 I 



14 

 14 



127 



100-00 



299 



Platinum Salt of Ethyl-Lepidine. — This salt was obtained in the same manner 

 as the corresponding one of ethyl-chinoline. It is, at the first moment of preci- 

 pitation, somewhat soft, but soon becomes hard and crystallized. It was pul- 

 verized and well washed with a mixture of alcohol and ether previous to ana- 

 lysis. 



