338 A COMPENDIUM UF 
Oleum Amygdale Expressum, Expressd 
Almond Oil.—Obtained from the seeds of the 
Sweet and Bitter Almond by expression; (the 
Amygdalus Communus, ) The process of extract- 
ing the oil from the seeds is first to deprive the 
almonds of their shells; they are then ground 
in a mill or bruised ina mortar; after which they 
are placed in canvas bags and subjected to press- 
ure between plates of ironor wood. ‘The oil as 
it comes from the press is turbid, but by stand- 
ing and filtration it becomes transparent, with 
a slight greenish color; has a specific gravity 
between 0.90 and 0.92; little or no odor, but a 
bland, sweetish taste. The oil is not soluble in 
alcohol, but freely soin ether and chloroform. 
Congeals at about (4° F., 20° C,) 4° below 
zero, Fahr. Contains 76 per cent. of olein and 
24 per cent. of palmitin and a trace of stearin. 
The oil is said to be frequently adulterated with 
poppy, walnut and benne oils. One test of its 
purity is by shaking five parts of the oil with 
one part of the following mixture (equal parts 
of sulphuric and fuming nitric acids) a yellow- 
ish white linament is formed.. The oil is occa- 
sionally prescribed in form of an emulsion for 
pulmonary diseases. The dose is from a fluid 
drachm toa fluid ounce (4 to 30 grams). Almond 
oil enter into the following officinal prepara- 
tions: UNGuENTUM Agu# Rosa U. S., UNGUEN- 
TUM SIMPLEX, UNGUENTUM CETACEI BR., ETC. 
Oleum Lini, Flaxseed or Linseed Oil.—Ob- 
tained by expression from the secds of the Li- 
num Usitatissimum, or Flax Plant, which has 
already been described. ‘There are several 
methods of preparing the oil for commercial 
