BOTANIC MATERIA MEDICA, 363 
oils. The oil consists of a small quantity of hy- 
drocarbon, about ;1,, the balance is the Methyl 
Salicylate or Acid Methyl Salicylate; at onetime 
the source of the salicylic acid. Its medical 
effects are carminative, alterative, and stom- 
achic, but it is principally used as a flavor or an 
adjunct to other remedies. It enters as an in- 
gredient into the following officinal prepara- 
tions: SPIRITS GAULTHERIA, SYRUPUS SARSAPA- 
RILL#, COMPOSITUS and TROCHISCI MORPHI& ET 
IPECACUHA. 
Oleum Hedeome, Hedeoma Oil, Penny- 
royal Oil, This volatile oil is distilled from all 
parts of the plant Hedeoma Pulegioides,—Nat- 
ural order Labiatie, also from the Mentha Pu- 
legium, a native of Europe. Althongh from 
distinct plants, the oils are analagous in their 
properties, When first distilled both oils are of 
a light straw color, but become brown by ex- 
posure and age. Specific gravity about 0.92, boils 
at about 365° F. Odor, pungent, aromatic, and 
of its own kind; taste, warm, pungently aro- 
matic, and reminds one of the mint oils. Its 
medical effects are carminative, and uterine 
stimulant; given in doses of from 2 to ro drops 
(0.12 to 0.6 gram); in large doses, poisonous, 
and therefore should not be sold indiscrimi- 
nately. ee 
Oleum Juniperi, Juniper Oil. Distilled from the 
fruit or berry of Juniperis Communis.—Natural 
order Coniferze. When this volatile oil is first 
distilled, it is colorless, but assumes on standing, 
a greenish tinge, having a specific gravity of 
0.87. Odor, terebinthine; taste, warm and 
