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526 DENTAL MEDICINE.

the pulse. For allaying febrile excitement it is frequently em-
ployed in the form of nitrous powders (nitre^gr. x ; tartar emetic,
gr. \ ; calomel, gr. \ to \).
In overdoses, nitrate of potassium causes pain and heat in the
stomach, vomiting and purging of blood, inflammation of the
bowels, great prostration, convulsions, and sometimes death.
The antidotes are emetics, mucilaginous and demulcent drinks,
and stimulants to sustain the sinking powers of the system.
Therapeutic Uses.—Nitrate of potassium is employed internally
as a refrigerant in febrile affections, in inflammatory diseases,
acute rheumatism, scurvy, purpura, haemoptysis, passive hemor-
rhages, asthma, etc. In fevers it is frequently combined with
other remedies. The vapor is used in spasmodic asthma.
Dose.—Of nitrate of potassium, gr. ij to gr. x.
Dental Uses.—In dental practice, nitrate of potassium has been
recommended in the incipient stages of alveolar abscess, being
introduced into the pulp canal and secured by a temporary filling
in the crown cavity of the tooth. It is also employed in inflam-
matory conditions of the mucous membrane of the mouth and
throat in the form of gargles.
DENTAL FORMULiE.
J^or Inflammation of the Mouth and ^^^ Inflamed Mucous Membrane and
<^«'«^-
Throat.
T. W. White. K- Potassii nitratis . . . ^ss
R. Potassii nitratis . . . 3J to gij Potassii chloratis . . ^ij
AquEe destillatse ... Oj. M. Sodii biboratis . . . 3J
SiGNA.—To be used as a gargle. Aquse destillata . . . ^ viij. M.
SiGNA.—To be used as an antiseptic
and refrigerant mouth wash.
POTASSII PERMANGANAS—PERMANGANATE OF POTASSIUM.
Formula.—KgM ngOg.
Derivation.—Permanganate of potassium is obtained by the
mixture of equal parts of black oxide of manganese and chlorate
of potassium, with a slight excess of caustic potassa, dissolving
in water, and evaporating to dryness, when it is exposed to a
nearly red heat; the chlorate of potassium yields oxygen, which
changes the black oxide of manganese into permanganic acid, and