138 
a fresh article. — Proc. Ass., Off. Agr. Chem., 22 Ann. Conv., (1905) 
1906, pp. 33-35. 
Pontius (Chem. Ztg., v. 28, p. 59) determined the active chlorine 
in bleaching powder, etc., by using the principle that hvpochlorous 
acid in the presence of primary sodium carbonate oxidizes iodide to 
iodate. He added the chlorinated lime solution to some primary 
sodium carbonate in a dish, then some starch paste and titrated 
with potassium iodide solution till the next drop caused no blue 
color. — Abstr. J. Am. Chem. Soc., 1905, v. 27, p. 1347. 
Tarugi, X.. discusses the formation and the constitution of bleach- 
ing powder (from Gaz. chim. Ital., 1905, v. 34, p. 254r-260, 466- 
468). He attributes the pink coloration of bleaching powder to the 
presence of iron, probably in the form of calcium ferrate. The iron 
cannot be determined by the permanganate method.— Abstr. J. Soc. 
Chem. Ind., Lond., 1905, v. 24, p. 25, 332. 
Peuter, L., discusses the chemistry of bleaching powder and the 
reactions involved in its production.— Pharm. Rev., 1905, v. 23, 
p. 125. 
Gehe & Co. point out that, of the 260,000 tons of chlorinated lime 
produced in 1904, fully one-half was produced by the electrolytic 
method. The United States jwoduces practically no chlorinated 
lime by the older Leblanc method. — Gehe & Co. Handels-Bericht, 
1905, p^. 12. 
CALX SULPHURATA. 
Lyons, A. B., believes that the U. S. P., VIII, requirement of 60 
per cent [later reduced to 55 per cent] of calcium sulphide, in calx 
sulphurata, is too stringent. That of the Ph. Brit.. IV, 50 per cent, 
he thinks reasonable. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 261. 
Ryan. J. J., tested 16 samples of calx sulphurata, the percentage 
of calcium monosulphide varied from 10 to 60 per cent; three, or 18.75 
per cent of the samples, corresponded to the U. S. P. requirements. — 
Proc. Massachusetts Pharm. Ass., 1905, p. 104. 
CAMPHORA. 
Timberlake, A., reviews the history of camphor, its production and 
the methods of purification; he also refers to other closely related 
products. — Proc. Indiana Pharm. Ass., 1905, pp. 95-101. * 
True, Rodney H., points out that camphor trees have been success- 
fully grown in Florida, Southern California. Texas, etc. These trees, 
it is asserted, yield a satisfactory quantity of crude gum when 
properly distilled. — Proc. Am. Pharm. Ass.", 1905, v. 53, pp. 273-274. 
Kimberlin, E. M. (Am. Druggist, v. 46, 1905, p. 315) describes 
some of the camphor trees growing in California and discusses the 
