method : also suggests a method for the estimation of the sulphate of 
calcium. — Chem. & Drug.. Lond., 1905, v. 67, p. 838. 
POTASSII BROMIDUM. 
Caspari. Charles E.. reports that of 25 samples of potassium bro- 
mide examined, Id answered the requirements of the U. S. P.. three 
contained an excess of potassium chloride, two contained potassium 
sulphate, one contained sodium, and five contained dirt mechanically 
held. — Proc. Missouri Pharm. Ass., 1905, p. 74. 
The committee on adulteration reports that of six samples examined, 
three answered the requirements of the TL S. P. : one was quite dirty, 
one contained potassium sulphate, and two an excess of potassium 
chloride. — Proc. Michigan Pharm. Ass., 1905, p. 79. 
Havenhill, L. D., reports finding one sample of potassium bromide 
containing an excessive amount of sulphates. — Proc. Kansas Pharm. 
Ass., 1905, p. 92. 
Meusser. A., discusses the solubility of potassium chloride, bromide, 
and iodide in water, both above and below 0° C. — J. Soc. Chem. Ind.. 
Lond., 1905, v. 24, p. 275 (from Ztschr. f. anorgan. Chem.. 1905, v. 44, 
pp. 79-80). 
POTASSII CARBONAS. 
Kebler, L. F.. in discussing the testing of chemical reagents, points 
out that with one exception all of the samples of potassium carbonate 
were reported to contain either chloride or sulphate, or both. The 
fact that one sample was free from these contaminations is pointed 
out as being evidence that a pure article can be produced. — Proc. Ass. 
Off. Agr. Chem., 22 Ann. Conv., p. 186. 
POTASSII CHTORAS. 
Ditz, Hugo, discusses the action of concentrated hydrochloric acid 
on potassium chlorate in the presence of potassium iodide or bro- 
mide. — Ztschr. f. angew. Chem., 1905, v. 18, pp. 1516-1520. 
Davidson. E.. has examined the decomposition of potassium chlo- 
rate, by hydrochloric acid, in dilute solutions, taking every precaution 
to exclude air. and determining after varying intervals of time the 
amount of chlorine set free. — J. Soc. Chem. Ind., Lond., 1905, v. 24, 
p. 844 (from Ztschr. f. angew. Chem). 
POTASSII CITRAS. 
Kebler, Lyman F.. reports a sample of potassium citrate as being 
off color, and containing mechanical impurities, chloride, and sul- 
phate. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 188. 
