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316 DENTAL MEDICINE.

mixing them together dry, and adding a little of the acid at a
time. When prepared, the mixture should be kept in a glass-
stoppered bottle. For bleaching purposes, chlorinated lime is
also combined with chloroform, in the form of a thin paste.
When chlorinated lime, or its combinations, is introduced into
the cavity of a tooth, it should be secured by a temporary filling
of gutta percha. Hill's Stopping, or one of the zinc preparations,
and be secured from passing beyond the foramen of the root, by
a filling introduced near the apex of the root. More than one
application may be required, after which the cavity should be
thoroughly cleansed, and a temporary filling of the whitest shade
of the oxychloride of zinc filling material be introduced and
worn for some time, after which a more durable gold filling can
be inserted.

DENTAL FORMULAE.
For Gangrene of the Mouth— Can- For Fetor of the Breath,
crum Oris. Bartholow.
R. Calc. chlorat ^iij
Bartholow.
Aquae destil ^ ij
R. Calc. chlorat gss Alcoholis ^ij
Mucilaginis |ss Qi. rosse gtt.iv. M.
Aquae destil giiiss. M. SlGNA.-^A teaspooriful in a tumblerful
SiGNA.—To be used as a lotion. of water ; used as a gargje.
CAMPHO-PHENIQUE.
Formula.—CgHnO.
Derivation.—A limpid, volatile fluid with a hot, aromatic taste,
and the odor of camphor, obtained from the chemical union of
carbolic acid and camphor. Dissolve 9 parts of the acid in one
part of alcohol and mix with 25 parts of camphor, forming a
clear oily solution. Campho-phenique can be prepared by heating
carbolic acid and pouring it into a bottle containing camphor-gum.
Medical Properties and Therapeutic Uses.—Campho-phenique is
an antiseptic, local anaesthetic, germicide and parasiticide. It is
also non-irritant, non-poisonous, insoluble in water or glycerine,
does not discolor or stain, and possesses an agreeable odor and
taste. It prevents suppuration in fresh wounds, controls it in
wounds in all stages, and as a local anaesthetic obtunds pain. It