439 
Blasdale, W. C., describes the Stassfurt salt industry and presents 
some data regarding the composition of the ore, the material as 
found, and the manufacture of pure potassium salts. — Chem. Eng., 
Phila., 1906-7, v. 5, pp. 59-65. 
Leffmann, Henry, points out that “ eikonogen,” a sodium naphthol 
sulphonate, is freely soluble in water, while the corresponding potas- 
sium compound is but sparingly soluble and that this substance can, 
therefore, be used as a reagent for potassium salts. — Proc. Pennsyl- 
vania Pharm. Ass., 1906, p. 162. 
Additional reagents and tests for potassium are referred to in the 
Exper. Sta. Rec., 1906-7, v. 18, pp. 608, 708, 909, 1037, etc. 
POTASSII ACETAS. 
The Ph. Brit. Committee of Reference in Pharmacy report on 
potassium acetate says the formula given does not represent the sub- 
stance actually in use, which can not, on a technical scale, be rendered 
anhydrous without decomposition. An allowance of 10 per cent water 
on drying at 110° C. would be reasonable. — Chem. & Drug., Bond., 
1906, v. 69, p. 684. 
Patch, E. L., reports examining four samples of potassium acetate. 
One contained 2,32 per cent of absolute acetic acid in excess and three 
contained 0.26, and 0.22, and 0.89 per cent of chloride, with trace of 
sulphate. — Proc. Am. Pharm. Ass., 1906, v. 54, p. 344. 
Caspari, Chas. E., reports 13 samples examined — 3 U. S. P., 4 con- 
tained metallic impurities, and 6 arsenic. — Proc. Missouri Pharm. 
Ass., 1906, p. 99. 
Bulkley, L. Duncan, states that potassium acetate is often of great 
value in the treatment of psoriasis, especially in the congestive forms. 
It may be combined with nux vomica and other drugs. — J. Am. M. 
Ass., 1906, v. 47, p. 1634. 
Additional references on the use of potassium acetate are included 
in the Index Medicus and the J. Am. M. Ass. 
POTASSII BICARB03STAS. 
Klienhans, F. A., states that he has used potassium bicarbonate 
on himself in the treatment of psoriasis. Sometimes the remedy 
affords relief and at other times it has no effect. — J. Am. M. Ass., 
1906, v. 47, p. 1638. 
POTASSII BITARTRAS. 
Philipp Roder, Wien, outlines a method for the titrimetric deter- 
mination of tartaric acid in potassium bitartrate. — Pharm. Zentralh., 
1906, v. 47, p. 522. 
Evans Sons Lescher & Webb state that the quantity of lead in 
cream of tartar is very seldom over 0.001 per cent, and that the arsen- 
