250 
Selected Articles. 
and completely dissolves it with the assistance of heat; if the 
solution be heated on a glass, the oil evaporates, leaving the 
caoutchouc in an unaltered state. It also dissolves some of 
the alkaloid and neutral bases, without heat, whilst others are 
soluble only by the aid of this agent. 
Capnomor is distinguished from creosote and picamar, by 
its taste, by its almost total insolubility in acetic acid, by its 
insolubility in the alkalies, and by the facility with which it 
dissolves caoutchouc ; from eupion by its specific gravity, by 
its point of ebullition, by the smoke it emits in burning, by its 
solubility in sulphuric acid, by its decomposition by nitric 
acid, by the property it possesses of dissolving carbazotic 
acid, &c. 
This new substance is found in all tars, even in that of coal, 
and likewise in Dippel's animal oil. Its use is as yet unknown. 
Journ. de Pharm. 
ART. LI. — PRODUCTS OF THE DISTILLATION OF PIT COAL. 
By F. F. Runge. (Poggendorff, Annalen xxxi. 65.) 
From the oil of pit coal rectified over oxide of copper, 
three bases and three acids are partly separated, or are part- 
ly formed, which differ in their chemical properties from any 
substances hitherto observed. . / 
BASES. 
1. Cyanol. 
Cyanol (blue oil) is a volatile substance, almost destitute 
oi any peculiar smell, neutralizing acids and forming salts 
which partly crystallize. It produces in a solution of mu- 
riate of lime a blue colour, which is removed by an excess of 
chlorine. The salts of cyanol dissolve in solutions of muriate 
of lime, producing a fine violet blue colour, which by free 
chlorine is converted into orange. They impart to the co- 
lourless solution of the white pith of the elder and pine wood, 
an intense yellow colour, which is not destroyed by chlorine, 
