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ACIDUM HYDRIODICUM DILUTUM. 
Bodraux, F., outlines a method for the rapid preparation of solu- 
tions of hydriodic acid by combining iodine with barium dioxide in 
the presence of water, adding an additional amount of iodine and 
treating this resulting solution with sulphur dioxide. — Bull, de la 
soc. chim. de Par., 1906, v. 35, pp. 493, 494. 
Arny, H. V., questions whether the dilute hydriodic acid will keep 
any better than does diluted hydrobromic acid or syrup of hydriodic 
acid; also whether the addition of potassium hypophosphite will ac- 
complish the preservation of the hydrogen iodide any better than it 
did in the syrup of 1890. — Am. J. Pharm., Phila., 1906, v. 78, p. 10. 
ACIDUM HYDROBROMICUM DILUTUM. 
Eberle, E. G., suggests that a formula for diluted hydrobromic 
acid by double decomposition between potassium bromide and tartaric 
acid be included in the Pharmacopoeia. — Proc. Am. Pharm. Ass., 
1906, v. 54, p. 450. 
ACIDUM HYDROCHLORICUM. 
Meyer, Theodor, illustrates and describes Oehler*s method for the 
production of hydrochloric acid and sulphates by heating a mixture 
of sodium chloride and sodium bisulphate. — Chem. Ztg., Cothen, 1906, 
v. 30, pp. 1295-1299. 
Reusch, K., reviews some of the economic conditions affecting the 
production of hydrochloric acid in Germany. — Ibid., v. 30, pp. 327- 
328. 
TTiebelitz, H., points out that it is difficult to find acids having 
exactly the specific gravity prescribed in the pharmacopoeia, and rec- 
ommends- that for hydrochloric acid, at least, a slight variation in 
specific gravity be permitted, and that the limits of this variation be 
stated. — Pharm. Ztg., Berl., 1906, v. 51, p. 1003. 
Yates, Ora, reports three samples of hydrochloric acid all labeled 
C. P.“ (one “ arsenic-free “), all of which contained arsenic. — Proc. 
Kansas Pharm. Ass., 1906. p. 35. 
Caspari, Chas. E., reports two samples examined: One U. S. P. ; 
one contained arsenic. — Proc. Missouri Pharm. Ass., 1906. p. 100. 
Kebler, Lyman F., reports that a sample of hydrochloric acid 
(C. P.) was found to contain a considerable quantity of fibrous 
matter. The nonvolatile matter, largely ferric chloride, in 50 c. c. 
amounted to 9.2 milligrams. A sample labeled “ free from arsenic ” 
was found to contain arsenic. — Proc. Am. Pharm. Ass., 1906, v. 54, 
p. 348. 
Ling. Arthur R., presents a note on the removal of arsenic from 
hydrochloric acid for use in the Marsh-Berzelius method, in which 
