Destructive Distillation of Animal Substances. 149 



highly soluble in alcohol, aether, and the fixed and volatile oils. 

 It dissolves with great facility in the acids, but even when added 

 in large excess it does not neutralize them. It precipitates alu- 

 mina, chromium, zinc, and peroxide of iron from their solutions, 

 but gives no precipitate with baryta, lime, magnesia, manganese 

 or nickel. It throws down oxide of lead from the nitrate, but 

 not from the acetate, a remarkable peculiarity, which it shares 

 with methylamine and ajthylamine. "With corrosive sublimate 

 it forms a double salt, but from salts of the suboxide of mercury 

 it throws down the oxide. Its odour is strong, aromatic, and 

 far from unpleasant. Its specific gravity is 0-921, and it boils 

 at 354°. The following results were obtained by analysis : — 



I. 4-075 grs. of collidine gave 11-800 grs. carbonic acid and 

 3*450 grs. water. 



II. 4-079 grs. of collidine gave 11*800 grs. carbonic acid and 

 3*393 grs. water. 



III. 4*124 grs. of collidine gave 11*980 grs. carbonic acid and 

 3*560 grs. water. 



100*00 10000 10000 100-00 121 



These numbers correspond with the formula C 15 H 11 N. Colli- 

 dine forms, therefore, another member of the picoline series, and 

 corresponds in constitution with the base described by Cahours, 

 under the name of xylidine, in the aniline series, with which, 

 however, it is isomeric only, and not identical, its properties being 

 different in all respects. 



The salts of collidine are for the most part highly soluble and 

 deliquescent. When evaporated, they form uncrystallizable 

 gummy masses, some of which, on standing, show traces of cry- 

 stallization. They are soluble also in alcohol, but not in aether. 

 The only highly crystallizable compounds are the mercury and 

 platinum double salts. 



The mercury double salt is thrown down in the form of a 

 curdy- white precipitate, on the addition of a solution of corrosive 

 sublimate to a solution of the hydrochloratc of collidine. It dis- 

 solves in boiling spirit, and is deposited, on cooling, in needles. 

 It could not be obtained of definite composition. 



I'lnlinochloride of Collidine is obtained when strong solutions 

 of hydrochloratc of collidine and bichloride of platinum are 

 mixed. It is slowly deposited in the form of orange-yellow 

 prisms or needles, according to the degree of concentration of 



