246 
that colchicine does not appear to act as such, but as a decomposition 
product, oxydicolchicine — Ztschr. f. exper. Path. u. Therap.. 1906. 
v. 2, p. 15. 
COLLODIUM. 
TCiebelitz, H.. suggests that the pharmacopoeia require that the 
film of collodion left after the evaporation of the solvent be clear and 
transparent and not opaque, indicating the freedom from water. — 
Pharm. Ztg., Berl.. 1906. v. 51. p. 1003. 
Philipp Eoder, TTien. points out that testing collodion for free 
acid is most readilv accomplished bv shaking the collodion with an 
t/ i. mJ c 
equal or double amount of water and then testing the resulting 
aqueous solution with litmus. — Ibid ., v. 51, p. 2T7. 
Beringer. George M., suggests the use of acetone as a solvent for 
pyroxylon and presents several formulas for acetone collodions. — 
Proc. Am. Pharm. Ass., 1906, v. 54, pp. 501-503. 
Taylor. S.. hopes to see these preparations made with acetone, 
which yields, by reason of its somewhat slower evaporation, thinner 
and quite as elastic films, and of remarkable tenacity. — Pharm. J., 
Bond., 1906, v. 23, p. 669. 
COLLODIUM CANTHARIDATUM. 
TTiebelitz, H., proposes to add to the description for cantharidal 
collodion, ” an olive-green liquid becoming brown in the course of 
time.*' — Pharm. Ztg.. Berk. 1906. v. 51. p. 1003. 
COLLODIUM FLEXILE. 
The author of an article (from Pharm. Ztg., li. Xo. 73, 1906, 
806) suggests that in the preparation of Collodium elasticum of the 
Ph. Germ., the castor oil (1) and turpentine (5) should be dissolved 
in spirit of ether (5). the solution filtered, evaporated, and sufficient 
collodion (to make 100) then added. He points out that this insures 
the removal of impurities and water, which are usually present in 
the Ph. Germ, turpentine. If larch turpentine is substituted for the 
official pinus turpentine this purification is not necessary. The oil 
and the larch turpentine are melted together, and the collodion is 
then directly added. — Proc. Am. Pharm. Ass.. 1907. v. 55. p. 650. 
COLOCYUTHIS. 
The Ph. Brit. Committee of Reference in Pharmacy report on colo- 
cynth pulp says: 
Ash 9 to 12 per cent, a limit for fixed oil ( extraction with petroleum spirit), 
and microscopical characters of the powder should be introduced. — Chem. & 
Drug., Lond., 1906, v. 69. p. 863. 
