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300 DENTAL MEDICINE.
The tincture of arnica, when largely diluted with water, forms
an efficient mouth wash during operations upon the teeth.
Equal parts of tincture of arnica and glycerine diluted with water
form an effective mouth wash in inflammations of the mucous
membrane of the mouth.

DENTAL FORMULAE.
For Abraded Surfaces of the Mucous For Ecchytnosis.
Membrane of the Mouth.
jj . Tincturoe arnicte . . . .^ss
R . Tincturae arnicae, Liquor ammonii muriat. J ss
Glycerini .... aii^j. M. Aquse ^v. M.
SiGNA.—To be used as a lotion,
Signa,—To be used as a lotion.
Astringent Mouth Wash in Alveolar
^"^ Inflamed and Ulcerated Mucous
Fyorrhcea, etc.
Mevibrane.
Dr. J. R. Bell.
R. Tincturse arnicse . . 3J R- Tincturse arnicse . . . ^\]
Acidi Carbolic! . . . ITLxx Glycerini ^^ij
Tincturae myrrhse . . ^ ss Aquse rosae ^ ij
Olei gaultheri£e . . g jss Aquse Destillatse . . . g x. M.
Alcoholis .... 2 ijss. M. Signa.—To be used as a gargle.
ATROPINiE SULPHAS—SULPHATE OF ATROPINE.
ATROPINE.
Formula.—C17H23NO3.
Derivation.—Sulphate of Atropine is obtained by adding a
mixture of sulphuric acid to an ethereal solution of atropine. It
is in the form of a white, slightly crystalline powder, very soluble
in water and alcohol, but insoluble in ether. It is inodorous,
and of a bitter taste.
Medical Properties and Action.—Sulphate of atropine has the
same medical properties and action as belladonna, of which it is
the alkaloid, but is far more energetic in its action. It is an
active poison, and should only be administered internally with
the greatest care. Hypodermically employed, it is a useful
anodyne and antispasmodic, and the quantity should be cautiously
increased from a very small dose in the beginning. Such
symptoms as dryness of the throat, vertigo, and diplopia, are
indications that its use should be discontinued. Without being
a direct hypnotic, it induces sleep by relieving pain. Although