fennel, in conjunction with other aromatic oils, may be used for
perfuming soap. It is procurable by distillation.

FLAG (SWEET) (_Acorus calamus_).--The roots, or
rhizome, of the sweet flag, yield by distillation a pleasant-smelling
oil; 1 cwt. of the rhizome will thus yield one pound of oil. It can be
used according to the pleasure of the manufacturer in scenting grease,
soap, or for extracts, but requires other sweet oils with it to hide its
origin.

GERANIUM (_Pelargonium odoratissimum_, rose-leaf
geranium).--The leaves of this plant yield by distillation a very
agreeable rosy-smelling oil, so much resembling real otto of rose, that
it is used very extensively for the adulteration of that valuable oil,
and is grown very largely for that express purpose. It is principally
cultivated in the south of France, and in Turkey (by the rose-growers).
In the department of Seine-et-Oise, at Montfort-Lamaury, in France,
hundreds of acres of it may be seen growing. 1 cwt. of leaves will yield
about two ounces of essential oil. Used to adulterate otto of rose, it
is in its turn itself adulterated with ginger grass oil (_Andropogon_),
and thus formerly was very difficult to procure genuine; on account of
the increased cultivation of the plant, it is now, however, easily
procured pure. Some samples are greenish-colored, others nearly white,
but we prefer that of a brownish tint.

When dissolved in rectified spirit, in the proportion of about six
ounces to the gallon, it forms the "extract of rose-leaf geranium" of
the shops. A word or two is necessary about the oil of geranium, as much
confusion is created respecting it, in consequence of there being an oil
under the name of geranium, but which in reality is derived from the