250 
Patch, Edgar L., reports finding a sample of potassium iodide con- 
taining an excess of iodate, free iodine, and iron. — Proc. Am. Pharm. 
Ass., 1905, v. 53, p. 188. 
Meusser, A., discusses the solubility of potassium iodide, bromide, 
and chloride in water and presents a chart and a table giving their 
solubility at different temperatures. — Ztschr. f. anorgan. Chem., 1905,. 
v. 44, pp. 79-80. 
Torrey and Hunter discuss the action of potassium iodide on ace- 
tone solutions of bromanil and chloranil. — Ber. d. deut. chem. 
Gesellsch., 1905, v. 38, pp. 555-556. 
POTASSII NITEAS. 
Hooper, D., discusses the process of nitrification with special ref- 
erence to the conditions obtaining in India. He gives some account 
of the districts where nitre earths occur and where the salt is manu- 
factured, describes the process of manufacture and gives a series of 
assays of samples of nitre earths, crude an-d refined saltpetre, and im- 
pure and purified table salt and other by-products. — J. Soc. Chem. 
Ind., Lond., 1905, v. 24, p. 1170. 
Kebler, Lyman F., reports finding a sample of potassium nitrate 
labeled “ C. P.” which contained but 86.3 per cent of pure potassium 
nitrate. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 188. 
Bensemann, R., makes a contribution to the analysis of potassium 
nitrate, discusses the practicability of converting the nitrate into 
carbonate by the addition of oxalic acid, dispel the liberated nitric 
acid and finally heat to convert the oxalate into carbonate. The re- 
sulting carbonate is then determined by titration. — Ztschr. f. angew. 
Chem. 1905, v. 18, p. 816. 
For some additional notes directing attention to methods for esti- 
mating the impurities in Chile saltpetre, see Ibid ., p. 939, also p. 1225. 
POTASSII PEEMANGANAS. 
Kebler, Lyman F., in discussing chemical reagents, points out that 
potassium permanganate usually contains chloride or sulphate or 
both. Inasmuch as it frequently serves as the basis in the prepara- 
tion of standard volumetric solutions every possible care should be 
exercised to secure a pure article. A number of samples examined 
show that arsenic is by no means an uncommon impurity. — Proc. 
Off. Agric. Chem., 22 Ann. Conv., p. 186. 
Gawalowski, A., describes several interesting reactions of potassium 
manganate and permanganate which appear to possess practical 
value. Among other reactions it is pointed out that the addition of 
metallic mercury to an alkaline 'permanganate results in the gradual 
production of a violet blue compound. — Merck’s Rep., N. Y. 1905, 
v. 14, p. 281. 
