this compound, rammed in very hard, a drop or two of some cheap otto is
poured on the top prior to corking. For this purpose otto of French
lavender, or otto of bergamot, answers very well. We need scarcely
mention that the corks are dipped into melted sealing-wax, or brushed
over with liquid wax, that is, red or black wax dissolved in alcohol, to
which a small portion of ether is added. The only other compound of
ammonia that is sold in the perfumery trade is Eau de Luce, though
properly it belongs to the druggist. When correctly made--which is very
rarely the case--it retains the remarkable odor of oil of amber, which
renders it characteristic.

EAU DE LUCE.

Tincture of benzoin: or, }
" balsam of Peru, } 1 oz.
Otto of lavender, 10 drops.
Oil of amber, 5 "
Liquor ammonia, 2 oz.

If requisite, strain through cotton wool, but it must not be filtered,
as it should have the appearance of a milk-white emulsion.

ACETIC ACID AND ITS USE IN PERFUMERY.--The pungency of the odor
of vinegar naturally brought it into the earliest use in the art of
perfumery.

The acetic acid, evolved by distilling acetate of copper (verdigris), is
the true "aromatic" vinegar of the old alchemists.

The modern aromatic vinegar is the concentrated acetic acid aromatized