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CHROMIC ACID. 221

ent cotton-wool, and allow them to For Chilblain.r.
dry. When required for use, a small R Acidi carbolici . . 7,)
piece may be cut off and slightly TincturiE iodi , . .^ii
warmed, when it can be inserted into Acidi tannici .
. . . .^ij
the carious cavity of the tooth, where Cerate Simplicis . ,^iv M.
it will solidify." iat unguentum.
For Odontalgia.
For Alveolar Pyorrhoea (^Riggs*
Disease). R. Collodii (fle.xile) . . gj
R . Acidi carbolici . . . ^([y Acidi carbolici . . . 3 ij M.
Spts. vini reclif ... gvj SiGNA.—Apply to surface of exposed
and painful pulp.
Aq. menthie pip. . . ^ ij
01. anisi filj
For Odontalgia.
01. cinnamon . . . fTLss. M.
R. Acidi carbolici ... ^ij
SiGNA.—Apply to gum with camel's-
Morphinse acetatis . . gr.xx. M.
hair brush.
SiGNA.—Apply to surface of exposed
An Antiseptic and Disinfectant pulp, on cotton.
Dentifrice.
Dressing for Root- Canals and
J. Stocken.
Abscesses.
R. Acidi carbolici . .
Dr. G. V. Black.
Pulvis ossis sepiae
.
R . Acidi carbolici . . i part
Pulvis.radicis iridis .
Oleum cassize ... 2 parts
Creta Preparatae .
Oleum gaultheriae . . 3 parts M,
Olei caryophylli . . gtt.iij M.
gtt.iij
Dressing for Children''s Teeth,
For a Carbolized Styptic.
Dr. L. L. Davis.
R. Acidi carbolici . . . x parts R. Acidi carbolici (cryst.) ^j
Collodii c parts Oleum cassise ... ^j
Acidi tannici . v parts
. . . Glycerini ^j
Acidi benzoici . v parts M.
.
. Alcoholis ^ij M.
It coagulates blood and albumen, It quickly relieves pain, and does
and cicatrizes the tissues. not nauseate.
For Pain after Extraction.
First wash out cavity with phenol-sodique, then apply on a loosely rolled
pellet of cotton the following
R. Acid, carbolici glacial 3;ij
Liq. potassje ^j
Water 3 vj. M.
ACIDUM CHROMICUM—CHROMIC ACID.
Formula.—H2Cr04.
Derivation.— Chromic acid is obtained in the form of brilliant,
deep red, acicular crystals, by the reaction of strong sulphuric