t oil. It has the specific gravity at 15 deg. C., 0.912.

_Musk (Artificial)._--Several forms of this are to be obtained,
practically all of which are nitro-derivatives of aromatic hydrocarbons.
The original patent of Baur, obtained in 1889, covered the
tri-nitro-derivative of tertiary butyl xylene. The melting point of the
pure article usually lies between 108 deg. and 112 deg. C., and the solubility
in 95 per cent. alcohol ranges from 1 in 120 to 1 in 200, though more
soluble forms are also made.

An important adulterant, which should always be tested for, is
acetanilide (antifebrin), which may be detected by the characteristic
isocyanide odour produced when musk containing this substance is boiled
with alcoholic potash, and a few drops of chloroform added. Acetanilide
also increases the solubility in 95 per cent. alcohol.

_Neroli Oil (Artificial)._--Like jasmine oil, the chemistry of neroli
oil is now very fully known, and it is therefore possible to prepare an
artificial product which is a very good approximation to the natural
oil, and many such are now on the market, which, on account of their
comparative cheapness, commend themselves to the soap-perfumer. These
consist chiefly of linalol, geraniol, linalyl acetate, methyl
anthranilate, and citral.

_Mirbane Oil_ or _Nitrobenzene._--This is a cheap substitute for oil of
bitter almonds, or benzaldehyde, and is a very coarse, irritating
perfume, only suitable for use in the very cheapest soaps. It is
prepared by the action of a mixture of nitric and sulphuric acids on
benzene at a temperature not exceeding 40 deg. C. Its specific gravity is
1.205-1.206; refractive index at 20 deg. C., 1.550; and boiling point, 206 deg.
C.

_Niobe oil_, or _ethyl benzoate_, the ester obtained from ethyl alcohol
and benzoic acid, and having the specific gravity at 15 deg. C.,
1.094-1.095; refractive index at 20 deg. C., 1.5167; boiling point,
196.5 deg.-198 deg. C.; soluble in 1.5 volumes of 70 per cent. alcohol.

_Oeillet_ is a combination possessed of a sweet carnation-like odour and
having as a basis, eugenol or isoeugenol. Its properties vary with the
source of supply.

_Rose Oil (Artificial)._--Several good and fairly cheap artificial rose
oils are now obtainable, consisting chiefly of citronellol, geraniol,
linalol, phenyl ethyl alcohol, and citral. In some cases stearopten or
other wax is added, to render the oil more similar in appearance to the
natural article, but a