314 
sensitive to light than others, probably due to a difference in molecu- 
lar arrangement or physical constitution. — Bull. Pharm Detroit, 1906, 
v. 20, p. 55. 
Garceau, A. (Northwest Med., Seattle, June), discusses the use of 
protiodide of mercury in syphilis. — J. Am. M. Ass., 1906. v. 47, p. 73. 
HYDRARGYRI IORIDUM RUBRUM. 
Francis, John M., thinks the red iodide of mercury can be more 
easily prepared than the yellow, but in limited quantity its produc- 
tion is costly and unsatisfactory. The most objectionable feature of 
the commercial article, the mercurous salts, is not provided for in the 
official process. He would modify the description of the test as fol- 
lows : two gms. of red mercuric iodide should wholly and quickly dis- 
solve in 100 c. c. of distilled water containing 2 gms. of potassium 
iodide. This test will secure a product suited for practically any 
pharmaceutical use. — Bull. Pharm., Detroit, 1906, v. 20, p. 55. 
Seidell, Atherton, outlines a method for the determination of mer- 
curic iodide in antiseptic soaps. He dissolves the soap in alcohol, 
acidifies with hydrochloric acid, dilutes with water, and precipitates 
the mercury with hydrogen sulphide. The iodine is determined by 
removing the liberated fats from the filtrate and treating the result- 
ing fat free solution with nitrous acid to liberate the iodine which is 
washed out with chloroform, and finally titrated with sodium thio- 
sulphate solution. — J. Am. Chem. Soc., 1906, v. 28, pp. 73-77. 
Orlow, X. A., discusses several reactions of mercuric iodide and its 
behavior with palladium chloride and thallium chloride in the pres- 
ence of silver chloride. — Chem. Ztg., Cothen, 1906, v. 30, p. 1301. 
Caspari, Chas. E., reports five samples examined; four U. S. P. ; 
one contained excess of soluble chlorides or iodides. — Proc. Missouri 
Pharm. Ass., 1906. p. 99. 
Ronchi (Rif. med., 1906, No. 10) prefers the biniodide in spite of 
the fact that subcutaneous injections of the salt, in solution or in sus- 
pension, are very painful. 
Batut (J. d. mal. cutan.. 1905, December) also returned to mer- 
curic iodide after trying other preparations. — Abstr. in Merck’s Ann. 
Rep., 1906 ; Darmstadt, 1907. v. 20. p. 130. 
HYDRARGYRI OXIDTJM FLAVUM. 
Dufau, Emile, makes further observations on an “ orange ” mer- 
curic oxide proposed by him (see J. de Pharm. et de chim., [6], v. 16, 
p. 439, 1902; also Carles, Rep. cl. pharm., 1904, p. 305), which is sup- 
posed to have properties intermediate between the red and yellow 
oxides and presents a new formula for an ointment. — J. de pharm et 
de chim.. Par., 1906, v. 23, pp. 100-103. 
