268 
account of the natural sodium carbonate found in Mexico. — The 
Spatula, 1905, v. 11, pp. 327-328 and 398— tOl. 
Ivebler, Lyman F.. asserts that sodium carbonate is one of the most 
difficult agents to procure of the required purity, as a chemical re- 
agent. It is usually contaminated more or less with chlorides. — Proc. 
Off. Agric. Client., 22 Ann. Conv., p. 187. 
SODII CITEAS. 
Patch, Edgar L., reports two samples of sodium citrate insoluble in 
20 parts of water. One contained an excess of lead. — Proc. Am. 
Pharm. Ass. 1905, v. 53, p. 189. 
SODII IODIDUM. 
Caspari, Charles E., says that of four samples of sodium iodide 
examined not one answered the official requirements. Three samples 
contained an excess of alkali, three contained iodate. one contained 
potassimn, and one contained metallic impurities. — Proc. Missouri 
Pharm. Ass., 1905, p. 75. 
SODII NITRAS. 
Tschernobajeff, D.. recommends that chlorates and perchlorates be 
determined together by Lemaitre’s method of reduction with sodium 
sulphite, and the chlorates be determined separately by reduction in 
the cold by means of iron and sulphuric acid according to Hendrix- 
son’s method. — Expt. Sta. Rec., v. 17. p. 7 (from Chem. Ztg., 1905, v. 
29, pp. 442-443). 
SODII PKOSPHAS. 
Ivebler, Lyman F., reports finding appreciable quantities of arsenic 
in sodium phosphate. Five of the samples examined contained from 
30 to 52 millegrammes of arsenic in 100 grammes. — Proc. Am. Pharm. 
Ass., 1905, y. 53, p. 189. 
Hoffmann, Aug., points out that the Ph. Germ., IV, test for the 
presence of sulphuric acid in sodiimi phosphate is liable to be mis- 
leading because of the failure to prescribe the quantities of nitric 
acid and of barium nitrate to be employed, and the relations of these 
to each other and to the solution of the salt. — Proc. Am. Pharm. Ass., 
1905, y. 53, p. 714. 
Thornton, E. Q., says that "Liquor Sodii Phospliatis Compositus ” 
of the 17. S. P., VIII, has little to recommend it. The reputation of 
sodium phosphate as a hepatic stimulant was established from the use 
of the salt, and not from a solution like this. — Tlierap. Gaz., 1905, y. 
29, p. 737. 
