mass from boiling water. The aqueous solution of the purified
crystalline scales then gave with ferric chloride only a small
flesh-colored precipitate. The crystals melted at 120 deg. C. In order
to demonstrate the presence of benzoic acid Herr Convert boiled the
crystals with water and silver oxide and dried the scales that separated
from the cooling filtrate over sulphuric acid. 0.0312 gramme gave upon
combustion 0.0147 gramme of silver, or 47.1 per cent. The benzoate of
silver contains 46.6 per cent, of metal; the crystals prepared from the
acid of ilang-ilang oil were, therefore, benzoate of silver. For the
separation of the alcoholic constituent, which is present in the form of
an apparently not very considerable quantity of benzoic ether, far more
ilang-ilang oil would be required than was at command.

[Footnote 1: _Comptes Rendus_, lxxvi. (1873), 1428, and abstracted in
the _Pharmaceutical Journal_ [3], iv., p. 28; also in _Jahresbericht_,
1873, p. 431.]

[Footnote 2: Overlooking Peru balsam and Tolu balsam.]

Besides the benzoic ether and, probably, a phenol, mentioned above,
there may be recognized in ilang-ilang oil an aldehyde or ketone,
inasmuch as upon shaking it with bisulphite of sodium I observed the
formation of a very small quantity of crystals. That Gal did not obtain
the like result must at present remain unexplained. Like the benzoic
acid the acetic acid is, no doubt, present in cananga oil in the form of
ether.

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