the essential oils are to be
carefully mixed with the powdered substances. Experience has convinced
him of the efficacy of this tooth powder, the habitual employment of
which, will suffice to preserve the gums and teeth in a healthy state.
For those who are troubled with excessive relaxation and sponginess of
the gums, he recommends the following astringent preparation:--

MIALHE'S DENTIFRICE.

Alcohol, one thousand parts; genuine kino, one hundred parts; rhatany
root, one hundred parts; tincture of balsam of tolu, two parts; tincture
of gum benzoin, two parts; essential oil of canella, two parts;
essential oil of mint, two parts; essential oil of aniseed, one part.

The kino and the rhatany root are to be macerated in the alcohol for
seven or eight days; and after filtration, the other articles are to be
added. A teaspoonful of this preparation mixed in three or four
spoonfuls of water, should be used to rinse the mouth, after the use of
the tooth powder.

CAMPHORATED CHALK.

Precipitated chalk, 1 lb.
Powdered orris-root, 1/2 lb.
Powdered camphor, 1/4 lb.

Reduce the camphor to powder by rubbing it in a mortar with a little
spirit, then sift the whole well together. On account of the volatility
of camphor, the powder should always be sold in bottles, or at least in
boxes lined with tinfoil.

QUININE TOOTH POWDER.

Precipitated chalk, 1 lb.
Starch Powder, 1/2 lb.
Orris powder, 1/2 lb.
Sulphate of quinine, 1 drachm.

After sifting, it is ready for sale.

PREPARED CHARCOAL.

Fresh-made charcoal in fine powder, 7 lbs.
Prepared chalk, 1 lb.
Orris-root, 1 lb.
Catechu, 1/2 lb.
Cassia bark, 1/2 lb.
Myrrh, 1/4 lb.

Sift.

PERUVIAN BARK POWDER.

Peruvian bark in powder, 1/2 lb.
Bole Ammoniac, 1 lb.
Orris powder, 1 lb.
Cassia bark, 1/2 lb.
Powdered myrrh, 1/2 lb.
Precipitated chalk, 1/2 lb.
Otto of cloves, 3/4 oz.

HOMOEOPATHIC CHALK.

Precipitated chalk, 1 lb.
Powder orris, 1 oz.
" starch, 1 oz.

CUTTLE FISH POWDER.

Powdered cuttle-fish, 1/2 lb.
Precipitated chalk,