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366 — DENTAL MEDICINE. — —
cated in plethora, constipation and deficient action of the liver,
kidneys and skin.
Dose.—Of the fluid of colchicum root Extractutn Colchici
Radicis Fluidum.^ 1TLij to TTLv. Of wine of colchicum root
Vinum Colchici Radicis^ TTlv to TTLxxx. Of acetous extract of
colchicum root Extractum Colchici Radicis^ gr. ss to gr. ij. Of
tincture of colchicum (seed) Tinctura Colchici^ Hlx to 5j-
COLLODIUM—COLLODION.
Derivation.—Collodion is a solution of 4 parts of pyroxylin
in 70 parts of stronger ether, and 26 parts of alcohol. Pyroxy-
lin or gun cotton is prepared by adding a mixture of nitric and
sulphuris acids to cotton freed from impurities.
Collodion is a colorless, syrupy, and very inflammable liquid,
with a strong ethereal odor. By long standing and exposure,
or when applied to a surface, it deposits a thin, transparent
and strongly contractile film, which is insoluble in water or
alcohol. It should be kept in glass-stoppered bottles. It is ap-
plied by means of a camel's-hair brush. When it becomes too
thick, it may be diluted by a solution consisting of ether, parts,
3
alcohol, I part.
Medical Properties and Action.—It is serviceable as an emol-
lient, and its action is mechanical, as it draws together and holds
in apposition divided parts, and protects such, as well as abraded
or denuded surfaces, from contact with the air. As the ether it
contains evaporates, the surface of the part to which it is applied
is constringed, and a degree of pressure is thus established, which
is very useful in moderating vascular action, promoting absorp-
tion, and changing the course of pus which may already be
formed into a direction more desirable. On account of the
liability of collodion to crack and peel off, these objections have
been obviated by the use of what is known as Flexible Col-
lodion— Collodium Flexile— (collodion, 92 parts, Canada turpen-
tine, 5 parts, castor oil, 3 parts), which is softer and more pliable
and elastic.
Therapeutic Uses.—Collodion is very useful in ulcers, fissures,
incised wounds, abraded surfaces, erysipelas, skin diseases, etc.
366 — DENTAL MEDICINE. — —
cated in plethora, constipation and deficient action of the liver,
kidneys and skin.
Dose.—Of the fluid of colchicum root Extractutn Colchici
Radicis Fluidum.^ 1TLij to TTLv. Of wine of colchicum root
Vinum Colchici Radicis^ TTlv to TTLxxx. Of acetous extract of
colchicum root Extractum Colchici Radicis^ gr. ss to gr. ij. Of
tincture of colchicum (seed) Tinctura Colchici^ Hlx to 5j-
COLLODIUM—COLLODION.
Derivation.—Collodion is a solution of 4 parts of pyroxylin
in 70 parts of stronger ether, and 26 parts of alcohol. Pyroxy-
lin or gun cotton is prepared by adding a mixture of nitric and
sulphuris acids to cotton freed from impurities.
Collodion is a colorless, syrupy, and very inflammable liquid,
with a strong ethereal odor. By long standing and exposure,
or when applied to a surface, it deposits a thin, transparent
and strongly contractile film, which is insoluble in water or
alcohol. It should be kept in glass-stoppered bottles. It is ap-
plied by means of a camel's-hair brush. When it becomes too
thick, it may be diluted by a solution consisting of ether, parts,
3
alcohol, I part.
Medical Properties and Action.—It is serviceable as an emol-
lient, and its action is mechanical, as it draws together and holds
in apposition divided parts, and protects such, as well as abraded
or denuded surfaces, from contact with the air. As the ether it
contains evaporates, the surface of the part to which it is applied
is constringed, and a degree of pressure is thus established, which
is very useful in moderating vascular action, promoting absorp-
tion, and changing the course of pus which may already be
formed into a direction more desirable. On account of the
liability of collodion to crack and peel off, these objections have
been obviated by the use of what is known as Flexible Col-
lodion— Collodium Flexile— (collodion, 92 parts, Canada turpen-
tine, 5 parts, castor oil, 3 parts), which is softer and more pliable
and elastic.
Therapeutic Uses.—Collodion is very useful in ulcers, fissures,
incised wounds, abraded surfaces, erysipelas, skin diseases, etc.
