n.| 



152 Dr Anderson on the Properties of Picoline, 



J r 9*670 grains of chloride of picoline and platinum gave 

 I 3-147 • • • platinum = 32'544 per cent. 



10*844 grains of cliloride of platinum and picoline gave 

 3*517 ... platinum = ^2'522 per cent. 



From these analyses are deduced the following atomic 



weights : — 



L II. 



1211*1 1213-7 



These agree sufficiently well with the theoretical atomic 

 weight, which is 1164*5. They correspond also precisely with 

 the results of the analysis of the aniline salts. The identity of 

 these results is shewn by the following table of the analyses 

 by Fritsche, Zinin, and Hoffman, of aniline from its different 

 sources, and of picoline, as well as of the platinum salts of 

 these substances : — 



Aniline.* Benzidam.* CyHnol. Picoline. Theory. 



C =z 77-73 77-32 76-67 77*17 77*29 



H = 7-60 7*50 7-72 7*69 7-43 



N = 14*98 14*84 15*62 15-14 15*28 



100*31 99*66 100*00 100*00 lOO'OO 



The following are the results for the platinum salts : — 



Benzidam. Kyanol. Picoline. Theory. 



Mean platinum, per cent. 32*501 32*886 32*533 32*94 



Atomic weight . 1216*1 1170'5 1212*4 1164*5 



The results of all these analyses agree perfectly with one 

 another ; but the properties possessed by picoline differ from 

 those of aniline, which, whether obtained from coal-tar, in- 

 digo, or nitrobenzid, presents ^ perfect identity in its chemi- 

 cal characters. 



Properties of Picoline. 



Picoline is a perfectly colourless, transparent, limpid fluid, 



extremely mobile, and destitute of viscidity. It possesses a 



powerful, penetrating, and somewhat aromatic smell, which, 



when very dilute, is replaced by a peculiar rancid odour, ad- 



* Not having the original papers of Fritsche and Zinin at hand, I extract 

 these two results from Berzelius' Arsherattelse, 1844, p. 454, where they are cal- 

 culated according to C=:76-12, the rest are with C=76, but the difference is 

 80 small as not to aflfect the comparison. 



