Dr Anderson on the Properties of Picoline. 151 



Constitution of Picoline, 

 The general analogy in properties which picoline bears to 

 aniline and the other oleaginous bases, permitted the as- 

 sumption that it, like these substances, was free from oxy- 

 gen ; I proceeded, therefore, in its analysis, upon this hypo- 

 thesis, and neglected the determination of the nitrogen. The 

 following are the results of the analyses : — 



[. { 15- 

 I 3- 



... .{ 



•630 grains of picoline gave 

 Analysis I. \ 15"954: ••• carbonic acid, 

 3-944: ... water. 



5*34:7 grains of picoline gave 

 15*100 ... carbonic acid, 

 3*670 ... water. 



Which give the following results per cent. : — 



I. II. 



Carbon . . 77*16 . 77*18 



Hydrogen . . 7*77 . 7*62 



Nitrogen . . 15*20 . 15*20 



100*00 100*00 



These results correspond closely with the formula C12 H7 N ; 

 the calculated result of which is — 



1164*5 100*00 100*00 



This formula is precisely the same as that of aniline, along 

 with which picoline occurs in coal-tar. In order to ascertain 

 whether the atomic weights of these substances were also 

 identical, I prepared the platinum salt of picoline, and deter- 

 mined the amount of platinum contained in it. The salt was 

 obtained by adding bichloride of platinum to a solution of 

 picoline in excess of hydrochloric acid : no immediate preci- 

 pitation took place unless the solutions were very concen- 

 trated, but in the course of twenty-four hours the salt was 

 deposited in fine orange-yellow needles. When dried at 212°, 

 it gave the following results : — 



