ed Oil.--This is entirely different in character to the expressed
oil. Its specific gravity at 15 deg. C. is 0.854-0.870; optical rotation,
+38 deg. to +54 deg.; soluble in 5-8 volumes of 90 per cent. alcohol.

_Linaloe oil_, distilled from the wood of trees of the Burseraceae
family, and obtained from Mexico. Specific gravity at 15 deg. C.,
0.876-0.892; optical rotation, usually laevo-rotatory, -3 deg. to -13 deg., but
occasionally dextro-rotatory up to +5 deg. 30'; esters, calculated as
linalyl acetate, 1-8 per cent.; total alcohols as linalol, determined by
acetylation, 54-66 per cent.; soluble in 1-2 volumes of 70 per cent.
alcohol.

This oil consists mainly of linalol, together with small quantities of
methyl heptenone, geraniol, and d-terpineol.

_Marjoram oil_, distilled from Origanum majoranoides, and obtained
entirely from Cyprus. Specific gravity at 15 deg. C., 0.966; phenols,
chiefly carvacrol, estimated by absorption with 5 per cent. caustic
potash solution, 80-82 per cent.; soluble in 2-3 volumes of 70 per cent.
alcohol.

This oil is used in soap occasionally in place of red thyme oil.

_Neroli Bigarade oil_, distilled from the fresh blossoms of the bitter
orange, Citrus bigaradia. Specific gravity at 15 deg. C., 0.875-0.882;
optical rotation, +0 deg. 40' to +10 deg., and occasionally much higher;
refractive index at 20 deg. C., 1.468-1.470; esters, calculated as linalyl
acetate, 10-18 per cent.; soluble in 0.75-1.75 volumes of 80 per cent.
alcohol, becoming turbid on further addition of alcohol.

The chief constituents of the oil are limonene, linalol, linalyl
acetate, geraniol, methyl anthranilate, indol, and neroli camphor.

_Orange (sweet) oil_, expressed from the peel of Citrus aurantium.
Specific gravity at 15 deg. C., 0.849-0.852; optical rotation, +95 deg. to +99 deg.;
refractive index at 20 deg. C., 1.4726-1.4732.

The oil contains some 90 per cent. limonene, together with nonyl
alcohol, d-linalol, d-terpineol, citral, citronellal, decyl aldehyde,
and methyl anthranilate.

_Palmarosa_, or _East Indian geranium oil_, distilled from Andropogon
Schoenanthus, a grass widely grown in India. Specific gravity at 15 deg.
C., 0.888-0.895; optical rotation, +1 deg. to -3 deg.; refractive index at 20 deg.
C., 1.472-1.476; esters, calculated as linalyl acetate, 7-14 per cent.;
total alcohols, as geraniol, 75-93 per cent.; solubility in 70 per cent.
alcohol, 1 in 3.

The oil consists chiefly of geran