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facturers, if they will only take the pains and extract the pure 
product from the fused mass [mess] they have heretofore furnished. 
TVith such a product we can safely guarantee uniformity in the 
strength of Donovan’s solution. — Am. J. Pharm., Phila., 190G, v. 
78, p. 394. 
Cowley and Catford (Trans, -orit. Pharm. Conf. (Yearbook of 
Pharmacy), 1905, 489-493) discuss the unsatisfactory character of 
much of the commercial arsenous iodide and criticise some of the 
processes suggested for its preparation, and suggest a method of 
preparation by which a very pure arsenous iodide may be easily 
made. — Proc. Am. Pharm. Ass.. 1906, v. 54, p. 850. 
The Pli. Brit. Committee of Keference in Pharmacy report on ar- 
senous iodide says it should be recrvstallized, so as to exclude a melted 
mixture of arsenium and iodine, which is very indefinite in compo- 
sition ; the aqueous solution should be acid and colorless. — Chem. and 
Drug., Lond., 1906, v. 69, p. 863. 
Wells, G. Harlan, has found that iodide of arsenic is most effective 
in promoting the nutrition of the cardiac muscle, one grain of the 
second or third decimal trituration three or four times daily. The 
trituration should be carried out as quickly as possible in a dark 
room, put at once in a capsule to be kept in black or amber-colored 
bottles. — Hahneman. Month., Phila., 1906, v. 41. p. 262. 
ARSENI TRIOXIDUM. 
Coblentz, Virgil, says that the formula As 4 O e used by some chem- 
ists is based on the vapor density taken between 500° and TOO 0 C., 
while at 1,770° C. and above the density corresponds to the old for- 
mula As 2 0 3 . The determination of the solubility of arsenous oxide 
is very unsatisfactory; aside from temperature, time plays a very 
important part. He cites an interesting table from Comey and adds 
that there are also great discrepancies if the determinations are car- 
ried out by the cooling of a hot saturated solution. — Am. J. Pharm., 
Phila., 1906, v. 78, p. 392. 
A news item presents some information on the production of white 
arsenic in the United States, also of the amount imported during the 
years 1900 to 1905, inclusive. The amount produced in 1905 was 
1.507.386 pounds as compared with 72,413 pounds produced in 
1904. — Oil, Paint and Drug Kep.. 1906, v. 70. July 16. p. 41. 
Rosentlialer. L.. outlines a method for the estimation of arsenic 
acid based on the reverse of the method for the determination of 
arsenic trioxide according to the equation : 
(1) As 2 0 3 +4XaHC0 3 +4I=As 2 0 5 +4XaI+4C0 2 +2H 2 0. 
The reaction proposed is based on the following equation : 
(2) 2H,As0 4 +4KI+4HC1=As 2 0 3 +4I+5KC1+5H 2 0.— Ztschr. f. 
anal. Chem., Wiesb., 1906. v. 45, pp. 596-599, 
