|
| at 15 deg. C. | .890-.900 | .888-.895 | .895-.898 | .897-.900 |
| Optical rotation. |-6 to -10 deg.|-9 to -18 deg.|-8 to -11 deg.|-8 to -11 deg.|
| Esters, calculated as | 20-27 | 27-32 | 20-27 | 18-23 |
| geranyl tiglate | per cent. | per cent. | per cent. | per cent. |
| Total alcohols, as | 68-75 | 70-80 | 65-75 | 66-75 |
| geraniol. | per cent. | per cent. | per cent. | per cent. |
| Solubility in 70 per | | | | |
| cent. alcohol. | 1 in 1.5-2 | 1 in 1.5-2 | 1 in 2-3 | 1 in 1.5-2 |
|_______________________|______________|______________|______________|______________|

The oil contains geraniol and citronellol, both free, and combined with
tiglic, valeric, butyric, and acetic acids; also l-menthone. The African
and Bourbon varieties are the two most commonly used for
soap-perfurmery, the Spanish oil being too costly for extensive use.

_Ginger-grass oil_, formerly regarded as an inferior kind of palma-rosa
but now stated to be from an entirely different source. Specific gravity
at 15 deg. C., 0.889-0.897; optical rotation, +15 deg.

The oil contains a large amount of geraniol, together with di-hydrocumin
alcohol, d-phellandrene, d-limonene, dipentene, and l-carvone.

_Guaiac wood oil_, distilled from the wood of Bulnesia sarmienti.
Specific gravity at 30 deg. C., 0.967-0.975; optical rotation, -4 deg. 30' to
-7 deg.; refractive index at 20 deg. C., 1.506-1.507; soluble in 3 to 5 volumes
of 70 per cent. alcohol.

The principal constituent of the oil is guaiac alcohol, or gusiol. This
oil, which has what is generally termed a "tea-rose odour," is
occasionally used as an adulterant for otto of rose.

_Lavender oil_, distilled from the flowers of Lavandula vera, grown in
England, France, Italy and Spain. The English oil is considerably the
most expensive, and is seldom, if ever, used in soap. The French and
Italian oils are the most common, the Spanish oil being a comparatively
new article, of doubtful botanical origin, and more closely resembling
aspic oil.

English Oil.--Specific gravity at 15 deg. C., 0.883-0.900; optical rotation,
-4 deg. to -10 deg.; esters, calculated as linalyl acetate, 5-10 per cent.;
soluble in 3 volumes of 70 per cent. alcohol.

French and Italian Oils.--Specific gravity at 15 deg. C., 0.885-0.