203 
calumbamine, calumbamine nitrate, the acid sulphate of calumbamine, 
the reduced base, and the several combinations of this reduced base 
(Tetrahydrocalumbamine). — Arch. d. Pharm., Berl., 1906, v. 244, 
pp. 255-269. 
Gadamer, J., points out that the work done by himself as well as 
the work undertaken by Giinzel and Feist serves to corroborate the 
assertion by Gordin that calumba does not contain berberine, but does 
contain at least several distinct berberine-like alkaloids. — Ibid., v. 
244, pp. 255-256. 
He discusses the chemical composition of the alkaloids found in 
calumba and their relations to berberine. — Pharm. Zentralh., 1906, v. 
47, pp. 828-831. 
Caldwell, Paul, asserts that a clear tincture of calumba may be 
obtained by using 6 minims of solution of potassium hydroxide to 
every pint. — Drug. Circ. & Chem. Gaz., N. Y., 1906, v. 50, p. 159. 
CALX. 
Low, Wilson H., outlines a method for determining the causticity 
of lime which depends on titrating a solution of lime in sugar water 
with tenth normal hydrochloric acid, using plienolpthalein as an in- 
dicator. He criticises a method outlined by Beall, depending on the 
decomposition of ammonium chloride by heating with finely pulver- 
ized lime. — Chem. Eng., Phila., 1906, v. 4, pp. 13-15. 
Kebler, Lyman, F., reports that two samples of calcium oxide C. P. 
examined were very dark in color, contained iron, aluminum, sand, 
sulphate, and chlorides. Virtually no better than ordinary lime used 
for building purposes. — Proc. Am. Pharm. Ass., 1906, v. 54, p. 348. 
CALX CHLORINATA. 
von Tiesenholt, W., discusses the composition of chlorinated lime, 
the method of its production, and the chemistry of its decomposi- 
tion. — J. f. prakt. Chem., Leipz., 1906, v. 73, pp. 301-326. 
Reusch, K., discusses the changes that have taken place in the pro- 
duction of chlorinated lime and reviews the literature of the year 
relating to the use of this article. — Chem. Ztg., Cothen, 1906, v. 30, 
p. 328. 
Lefeldt, Max, suggests that the Ph. Germ, include a maximum as 
well as a minimum requirement for free chlorine. The minimum 
requirement is 25 per cent and it is possible to find, in commerce, 
samples of this article that contain 50 per cent more chlorine than 
this minimum. — Ber. d. pharm. Gesellsch., Berl., 1906, v. 16, p. 333. 
Blome, W. H., found several pound cans of chlorinated lime which 
averaged 26 per cent of available chlorine. 'While not up to the 
