126 DR ANDERSON ON THE CONSTITUTION AND PROPERTIES OF PICOLINE, 



immediately followed, consisted of a mixture of picoline and aniline. The first 

 portion was again digested with fused potass and rectified ; that which distilled 

 at 272^ was collected apart, and constituted pure picoline. 



Constitution of Picoline. 



The general analogy in properties which picoline bears to aniline and the 

 other oleaginous bases, permitted the assumption that it, like these substances, 

 was free from oxygen ; I proceeded, therefoi-e, in its analysis, upon this hypothesis, 

 and neglected the determination of the nitrogen. The following are the results 

 of the analyses : — 



I 5-630 grains of picoline gave 

 Analysis I. J 15954 ... carbonic acid, 

 I 3-944 ... water. 



t 5-347 grains of picoline gave 

 II. ■; 15-100 ... carbonic acid, 

 3-670 ••■ water. 



100-00 . 10000 



These results correspond closely with the formula C^. H; N ; the calculated 

 result of which is — 



1164-5 . 10000 . 100-00 



This formula is precisely the same as that of aniline, along with which pico- 

 line occurs in coal-tar. In order to ascertain whether the atomic weight of these 

 substances were also identical, I prepared the platinum salt of picoline, and de- 

 termined the amount of platinum contained in it. The salt was obtained by add- 

 ing bichloride of platinum to a solution of picoline in excess of hydrochloric acid : 

 no immediate precipitation took place unless the solutions were very concentrated, 

 but in the course of twenty-four hours the salt was deposited in fine orange-yel- 

 low needles. When dried at 212", it gave the following results : — 



Y f 9-670 grains of chloride of platinum and picoline gave 

 ■^•\3] 



•147 ... platinum = 32-544 per cent. 



„.{ 



10-814 grains of chloride of platinum and picoline gave 

 3-517 ... platinum =:= 32-522 per cent. 



