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SOLUTION OF ACETATE OF AMMONI. 283

an antacid is serviceable in acid conditions of the oral fluid, in
superficial caries of the teeth, erosions, and sensitive necks of
teeth,
LIQUOR AMMONII ACETATIS—SOLUTION OF ACETATE OF
AMMONIA.
SPIRIT OF MINDERERUS.
Formula.—NH^C,H.,0.,.
Derivation.—Spirit of Mindererus is obtained by saturating
diluted acetic acid with carbonate of ammonia, being a solution
of the acetate of ammonia.
It is a colorless liquid, with a saline taste, and requires to be
freshly made when about to be used.
Medical Properties and Action.—It is refrigerant, diaphoretic,
and diuretic, and its action can be greatly increased by combina-
tion with other remedies. Few medicines are in more general
use.
Therapeutic Uses.—Spirit of mindererus is employed in the
treatment of febrile and inflammatory affections, and exanthe-
mata, sick headache, catarrh and influenza, etc., etc. Exter-
nally it is used as a lotion to sprains, bruises, glandular enlarge-
ments, etc.
Dose.—Of spirit of mindererus, f5j to f.3J.
Dental Uses.—A lotion composed of one part to ten of water
is a serviceable application in inflamed conditions of mucous
membrane. Internally administered as a refrigerant it is useful
in acute periosteal inflammation, inflammation of the dental pulp
—pulpitis, and is a diaphoretic and refrigerant in periodontitis,
when it may be combined with either aconite or opium, or both.

AMMONII CARBONAS—CARBONATE OF AMMONIUM.
/bm«A7.—NH.HCOg, NH,NH2C02.
Derivation.—Carbonate of Ammonium is a sesquicarbonate,
and is obtained by subliming a mixture of chloride of ammonium
and chalk. It is in the form of white, translucent masses, with
a pungent ammoniacal odor, and an acrid, alkaline taste. It is
soluble in water, and on exposure to the air it becomes opaque
and falls into powder, losing its ammonia.