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AIROL. 273 :

rapid breathing as a pain obtunder, yet he differs with him
as to the theory or nature of the changes in the different
symptoms brought about during its progress. Dr. Hewson states
"Every circumstance would therefore seem to indicate that this
process of inducing insensibility to pain is one essentially of di-
minished oxidization and decarbonization of the blood, and recog-
nizing such a state as belonging to the initiative stage of all an-
aesthetics, when insensibility to pain is positively marked, we have
no necessity for begging any special theory for this process, as in
its action it readily comes under the category of such agents, and
is thus not either an absurdity or an impossibility from a scien-
tific point of view."
AIROL,
Derivation.—Airol is a Gallate of Bismuth Iodide. It is in
the form of a grayish-green powder.
Medical Properties and Physiological Action.—The iodine is so
combined in this preparation as to render it an extremely active
antiseptic, and deodorizer and no irritating or toxic effects ensue
from its too rapid liberation.
Therapeutic Uses.—Locally applied it is an efficient antiseptic
and deodorizer in ulcerative and suppurative conditions.
Dental Uses.—Airol is employed in the treatment of devitalized
teeth, putrid conditions of the pulp, its application in the form of
the dry powder causing a dessicative action as well as antiseptic.
It is also serviceable in chronic inflammation of pulps of teeth,
acting somewhat like pepsin.
It should be confined in the tooth-cavity by a gutta percha
filling, and retained for one or two days, when the pulp will pre-
sent a dry, aseptic appearance.
ACTOL—SILVER LACTATE.
Formula.—AgC^H,0^=H20.
Therapeutic and Dental Uses,—Actol occurs in the form of a
white, tasteless, and inodorous powder, soluble in water, and is
recommended as a surgical antiseptic and germicide. It is used
as a hypodermic injection in erysipelas ; as a wash, a teaspoonful
i8