CANADIAN TURPENTINE. 5 1 



and balsamic, taste aromatic to bitter and finally acrid. 

 Miscible with absolute alcohol, acetone, acetic acid, 

 amyl alcohol. Polarizes light to right. 



Chemistry. — The ethereal oil — 15 per cent. — is made 

 up of two parts, one distilling at 1 5 7° F. , the other, smaller, 

 at i9o°F. The resin is freely soluble in acetone, alcohol, 

 and benzol. 



Adulterations. — Other resins dissolved in turpentine. 



CANADIAN TURPENTINE. 



Canadian Turpentine is an oleoresin derived from 

 Abies balsama, a tree of the northern parts of North 

 America, also extending southward along the high 

 mountains as far as Virginia. 



The oleoresin is contained in superficial secretory 

 passages lying mainly in the outer bark. These are 

 somewhat flattened, blister-shaped, and are punctured 

 with appropriate instruments, the turpentine issuing 

 from them as a viscous fluid with a yellowish or greenish 

 color, sometimes slightly fluorescent. It has a pleasant 

 and durable aromatic odor. The taste is terebinthinate 

 and sharp, at times acrid. 



Chemistry. — Water extracts a bitter stuff; oil, 20 to 

 25 per cent.; resin, elastic or tenacious and clear yel- 

 lowish. Ethereal oil consists of a carbohydrate, Cj^H,,, 

 and a small amount of an acid oil ; the two differentiate 

 at 167° and 170°?., respectively. 



The resin of Canada balsam rotates light to the right, 

 is non-crystalline, refraction index 1.52, soluble in abso- 

 lute alcohol, 75 per cent, residue in ether, soluble in 

 xylol, chloroform, benzol. It remains clear and darkens 

 slightly on standing. 



COLOPHONIUM. RESm. ROSIN. 



Colophonium is the residue left after distilling off the 

 volatile oil from turpentine. 



