356 
15 parts of water; as a rule this article also exceeds the limit for 
iron. — Am. Druggist, X. Y., 1906. v. 49, p. 362. 
Patch. E. L.. reports magnesium oxide not white in color, con- 
taminated with iron, magnesium carbonate and calcium, assayed 
82.9 per cent MgO. — Proc. Am. Pharrn. Ass., 1906, v. 54, p. 339. 
MAGNESII SULPHAS. 
Hankey, William T.. asserts that commercial magnesium sulphate 
complies with all of the U. S. P. VIII requirements with the pos- 
sible exception of the limit for iron. He doubts the advisability of 
paying several hundred per cent more for a strictly U. S. P. 
article. — Am. Druggist, X. Y., 1906, v. 49, p. 362. 
Moszler, Guatao, discusses the estimation of sodium sulphate in 
magnesium sulphate and asserts that all preparations of magnesium 
sulphate evidence a minute quantity of sodium sulphate. He sug- 
gests that the sodium content of magnesium sulphate should be 
limited to the equivalent of 0.5 per cent crystalline sodium sulphate, 
or 0.221 |)er cent of the anhydrous substance. — Ztschr. d. allg. oesterr. 
Apotk.-Yer., Wien, 1906, v. 44, pp. 53-54, 67-69. 
Smith, F. A. Upshur, points out that magnesium sulphate and all 
salts containing water of crystallization and hygroscopic as well as 
deliquescent substances generally should be directed to be kept in 
well-closed vessels and asserts that this precaution is more honored 
in the breach than hi the observance as regards ordinary dry crystals 
and powders. — Pharm. J., Lond., 1906, v. 22, p. 84. 
Gane, E. H., points out that careless drying is the cause of dirt 
and foreign matter in dried magnesium sulphate. — Proc. Am. Pharm. 
Ass., 1906, v. 54. p. 345. 
Caspari, Chas. E.. reports that one sample of magnesium sul- 
phate contained arsenic, chloride, and metallic impurities. — Proc. 
Missouri Pharm. Ass.. 1906. p. 103. 
Baird. J. W.. reports three samples examined in 1904, one adul- 
terated. — Proc. Massachusetts Pharm. Ass.. 1906. p. 59. 
G. Hell & Co., in Troppau. report that 5 out of 18 samples of mag- 
nesium sulphate were refused because of excessive amount of chlorides 
and of iron. — Pharm. Post, Wien. 1906. v. 39. p. 181. 
Cernovodeanu and Henri find that the addition of salts of magne- 
sium in very small quantity augments the haemolytic power of certain 
serums to the globules of different annuals, but does not provoke hae- 
molysis of the globules of the same animal. The serum heated to 56° 
can not be activated by the addition of salts of magnesium. — J. de 
pharm. et de chim.. Par. 1906. v. 23, p. 462. 
Haubold and Meltzer record a series of experiments on animals and 
discuss the practicability of the use of magnesium sulphate as an 
