tood that where an odoriferous material is unnoticed,
it has no qualities peculiar enough to be remarked on, and that the
methods adopted for preparing its essence, extract, water, or oil, are
analogous to those that have been already noticed, that is, by the
processes of _maceration_, _absorption_, or _enfleurage_ for flowers, by
_tincturation_ for roots, and by _distillation_ for seeds, modified
under certain circumstances.

There are, however, three other important derivative odors--ambergris,
civet, and musk--which, being from the animal kingdom, are treated
separately from plant odors, in order, it is considered, to render the
whole matter less confused to manufacturers who may refer to them.
Ammonia and acetic acid, holding an indefinite position in the order we
have laid down, may also come in here without much criticism, being
considered as primitive odors.

On terminating our remarks relating to the simple preparations of the
odors of plants, and before we speak of perfumes of an animal origin, or
of those compound _odors_ sold as bouquets, nosegays, &c., it may
probably be interesting to give a few facts and statistics, showing the
consumption, in England, of the several substances previously named.

QUANTITIES OF ESSENTIAL OILS, OR OTTOS, PAYING 1_S._ PER POUND DUTY,
ENTERED FOR HOME CONSUMPTION IN THE YEAR 1852.

lbs.
Otto of bergamot, 28,574
" caraway, 3,602
" cassia, 6,163
" cloves, 595
Otto of lavender, 12,776
" lemon, 67,348
" peppermint, 16,059
" roses, 1,268
" spearmint, 163
" thyme, 11,418
" lemon grass, }
" citronella, } 47,380
And other ottos not otherwise described, }
-------
Total essential oils or ottos imported in one year, 195,346

at the duty of 1_s._ per pound, yield a revenue annually of 9,766_l._
16_s._

It would appear by the above retu