BOTANIC MATERIA MEDICA, 373 
allyl iodide (propionyl) with potassium sulpho- 
cyanate. Like all the oils, it is liable to be 
adulterated with alcohol, petroleum oil, ete. 
The oil is used externally only, in form of the 
LINIMENTUM SINAPIS COMPOsITUM. The oil has 
no rotating power. 
Oleum Succini, Amber Oil. Obtained by 
the destructive distillation of the fossil resin of 
the extinct species of the Conifers, found in 
Prussia and thrown up by the Baltic Sea. The 
fossil has also been found in Sicily and the 
United States. The volatile oil is purified by 
subsequent rectification, and accurs in com- 
merce as a nearly colorless liquid ; specific grav- 
ity, 0.758, and boils at about 186° F. The odor 
unpleasant and of its own kind; taste, hot and 
acrid; imparts to water its odor and taste, but 
is freely soluble in pure alcohol, ether, and 
chloroform. By long exposure to light and air 
it turns very dark, and ultimately becomes solid. 
The constituents of the oil are not clearly de- 
fined, but it is termed by Mr. Doepping a car- 
bo-hydrogen. The rectified oil is stimulating 
and antispasmodic in its effects. The dose is 
from 5 to 15 drops (0.3 to 1.0 gram), given in 
olive oil and brandy. Not much used asa rem- 
edy in modern practice. 
Oleum Terebinthinz, Turpentine Oil. Dis- 
tilled from the oleoresin of the various Pines; in 
this country from the Pinus Palustris.—Natural 
order Conifere. This volatile oil is known in 
commerce as spirits of turpentine. By redis- 
tillation with a solution of caustic potash it is 
obtained perfectly pure, In this state it is a 
limpid, colorless liquid, with a penetrating odor 
