
DESTRUCTIVE DISTILLATION OF ANIMAL SUBSTANCES. 255 
when dropped into a small quantity of that fiuid it floats on the surface, and is only 
slowly dissolved on agitation. It possesses the remarkable property of immediately 
separating from its solution on the application of a gentle heat, and collecting on 
the surface in the form of an oily layer which dissolves again as the temperature 
falls. Its smell is less pungent and more aromatic than that of picoline, and it is 
also more oily in its characters. It unites with the acids and forms salts, all of 
which are highly soluble. 
Analyses were made of the different portions of oil boiling about the tempera- 
ture of 310°, with the following results :— 




3-840 grains of the base, boiling between 310° and 315°, gave 
I. {11:007  ... of carbonic acid, and 
3°060 ... of water. 
4-012 grains of the base, boiling between 315° and 320°, gave 
II. 411-516 ... of carbonic acid, and ; 
3160 ... of water. 
4-319 grains of the base, boiling between 316° and 320°, gave 
III. 4 12:430 ... of carbonic acid, and 
3576 ... of water. 
4-430 grains of the base, boiling between 320° and 324°, gave 
IV. 412-812 ... of carbonic acid, and 
3-405 ... water. 
1 II. III. IV. 
Carbon, : 78:17 78°28 78-48 78°87 
Hydrogen, . 8:85 8-75 9-10 8-54 
Nitrogen, . 12:98 12:97 12°42 12-59 
100-00 100-00 100-00 100-00 
These results agree very closely with the formula C,, H, N, as is shewn by the 
following comparison of the mean experimental and calculated numbers. 


Mean. Calculation. 
— =. 
Carbon, . S 78:45 8-50 Ch 84 
Hydrogen,. °. 8°81 8:41 H, 9 
Nitrogen, . ; 12°54 13-09 N 14 
100-00 100-00 107 
Notwithstanding the close correspondence of these results, however, further 
experiment shewed that some of the fractions, especially those of lower boiling 
points, contained appreciable quantities of picoline, the presence of which was 
established by the analysis of the platinum salts. When, for instance, a portion 
of any of these fractions was saturated with dilute hydrochloric acid and bichloride 
of platinum added, fine prismatic crystals were slowly deposited, which, as the 
result of numerous experiments, were found to contain about 32:8 per cent. of 
platinum, which is exactly the quantity present in the picoline salt, of which the 
theoretical per-centage is 32°92. On evaporation of the mother liquor, crystals 
were deposited which gave quantities of platinum varying from 32°5 to 32:0 per 
VOL. XX. PART Il. 3Z 
