920 Wisconsin Academy of Sciences, Arts, and Letters. 
from the drug varying according to the proportion of oil and resin naturally 
present: 
2. The menstruum used, ethylic ether, extracts principles which are 
often insoluble in alcohol or diluted alcohol, and vice versa. Oleoresin of 
Cubeb, for instance, is not identical with Fluid Extract of Cubeb: 
3. They are without exception the most concentrated liquid prepara¬ 
tions of the drugs that are produced.’ ’ Bemington, Pract. of Pharm. 
(1894), p. 433. 
i ‘ Oleoresins are those substances obtained from vegetable medicines by 
means of ether (sometimes alcohol, etc.,) which consist principally of a 
fixed or volatile oil and a resin. In some cases the resin will be held in 
solution by the oil, while in other cases, it will be precipitated upon stand¬ 
ing and will require agitation to diffuse and suspend it in the oil. A 
third case occurs in which the oil and resin form a more or less perman¬ 
ent mixture, having the consistency of a very soft extract.’’ King’s Am. 
Disp. (1900), p. 1330. 
‘ ‘ Oleoresins are ethereal extracts of an oleoresinous nature, obtained 
from vegetable drugs by percolation with ether,” Coblenz’s Handbook of 
Pharm. (1902), p. 290. 
‘ ‘ Oleoresins, Oleore$mae (Oleoresins, L. oleum , oil and resina, resin) — 
Natural solutions of resin in volatile oils, extracted by ether, acetone or 
alcohol.” Culbreth, Mat. Med. (1906), p. 20. 
“The pharmaceutical oleoresins are liquid preparations of drugs con¬ 
taining volatile oil and resin, obtained by percolation of such drug with 
acetone, ether, or alcohol, and subsequent distillation of the solvent from 
the dissolved oleoresins.” Arny, Prin. of Pharm. (1909), p. 259. 
“Solutions of this class represent the medicinal virtues of the drugs 
from which they are made, in a more concentrated form than is possible 
in any other. They possess the power of self-preservation, and in this 
respect are superior to fluidextracts. Oleoresins consist chiefly of fixed 
or volatile oils associated with resin and other constituents; those of¬ 
ficially recognized, with one exception, are all prepared, ” et cetera. 
Caspari, Treat, on Pharm. (1916). p. 354. 
Drugs Used, Their Collection, Preservation, Etc. 
Since the oleoresins are characterized chiefly by their content 
of oil and resin (see definition above), it is evident that they 
may be prepared from many of the numerous vegetable drugs) 
of which these substances constitute an appreciable part. The 
number of such drugs, however, which has actually been used 
for this purpose, is comparatively small as is shown in the 
table which follows. The table also reveals the fact that nearly 
all of these drugs are derived from phenogamous plants and 
that they consist, as a rule, of those organs in which oils and 
resins are usually present in the greatest abundance. 
