VOLATILE OIL OF GAULTHERIA PROCUMBENS. 219 
Oil of Gaultheria and Bromine. — If an excess of bro- 
mine is added to oil of gaultheria, the mixture instantly be- 
comes hot, and hydrobromic acid is evolved. When all the 
oil has combined, the whole becomes a crystalline mass. By 
the application of a gentle heat the excess of bromine and hy- 
drobromic acid are driven off, and on cooling, the compound 
is obtained perfectly pure. Its solution in hot alcohol, on 
cooling, yields tufts of acicular crystals. It fuses at 140°, 
and commences subliming at 150° Fahr.; but does not recrys- 
tallize for some time after cooling. When heated in close 
vessels, its vapor condenses in minute drops, which become 
crystalline by standing. Its taste and odor are peculiar, and 
differ from the chlorine compound. Its solution in potassa 
is light yellow, from which it is precipitated perfectly white 
by an acid. 
Oil of Gaultheria and Iodine. — Oil of gaultheria dis- 
solves iodine readily, but does not combine directly with it, 
as the solution may be heated without the production of hy- 
driodic acid. When, however, either of the preceding com- 
pounds is mixed intimately with iodide of potassium, the 
mixture acquires a brownish color; and when heated very 
gradually a red vapor arises, and condenses in a crystalline 
form on the sides of the tube. This substance is insoluble in 
water, soluble in alcohol and ether, and fuses readily. 
Oil of Gaultheria and Cyanogen. — When either the chlo- 
rine or bromine compound of oil of gaultheria is intimately 
mixed with cyanuret of potassium or mercury, and heated in 
a tube, a white vapor rises, and condenses in the form of 
a yellow oil, which, by standing, becomes crystalline. Its 
odor is very peculiar; it crystallizes in needles, and is soluble 
in alcohol and ether. 
Jlction of Ammonia on the compound of Chlorine and 
Oil of Gaultheria. — A portion of the chlorine compound, 
which had been fused several times to entirely deprive it of 
vol. viii. — no. in. 28 
