66 
Ferraro and Carobbio present a modification of the Bettendorf 
test for arsenic which consists in adding to the suspected liquid a 
thin piece of tin and ten or twelve drops of hydrochloric acid and 
heating for from ten to twelve minutes. ( Boll. ehim. farm., v. Ft. p. 
805.) — Pharm. Ztg.. Berl.. 1906, v. 51. p. 214. 
The Ph. Austr. VIII directs that the Bettendorf test for arsenic 
be used in place of the formerly official Marsh test. 
Thorpe, Thomas Edwards, finds that the arsenic occasionally 
present in wall papers, fabrics, etc., can be accurately and expe- 
ditiously determined by the electrolytic method. — J. Chem. Soc., 
Lond., 1906. v. 89. pot. 1. pp. -108— ±13. 
Kebler. L. F.. discusses the several available tests for arsenic and 
points out that the arsenic mirror obtained by the Marsh-Berzelius 
method is comparable in all respects with the corresponding mirror 
obtained by the electrolytic method, and that equally satisfactory 
determinations can be made by using the one or the other method. — 
Proc. Ass. Off. Agric. Chem., 23d Ann. Conv.. pp. 181-182. (Bull. 
Bur. Chem., U. S. Dept. Agric. 1907, Xo. 105.) 
Galimard and Yerdier outline a modification of the Marsh test 
which involves the breaking down of the organic compounds of arsenic 
found in glycerin. — J. de pharm. et de cliim. Par., 1906, v. 23. p. 183. 
De Vamossy, Zoltan, finds, as the result of his researches on the 
activants in the disengagement of hydrogen in the Marsh apparatus, 
that, contrary to the earlier experiences of Gautier, one may employ 
the salts of copper as well as the salts of platinum : the quantitative 
results are the same and all of the metalloid is recovered in the ring. — 
Bull. Soc. de chim. Par., 1906, v. 35, pp. 21—28. 
Gautier. Armand. replies that he still holds to his opinion of thirty 
years, and insists that the employment of platinum is indispensable. — 
Ibid., pp- 207, 208. 
Betrand and De Vamossy (Ann. Chim. Pliys., 1906, v. 7, pp. 
523-536) present some observations on the estimation of arsenic by 
means of the Marsh apparatus, and point out the need of regulating 
the flow of gas and other conditions influencing the test. — Biochem. 
Centralbl., Leipz., 1906-7, v. 5, p. 881. 
Thomson. William, describes an improvement in the cooling method 
for condensing the arsenic mirrors in arsenic determinations, certain 
details of electrolytic methods and the sensitization of zinc in the 
Marsh-Berzelius apparatus by cadmium sulphate. — Brit. Food J., 
LoncL, 1906, v. 8, j^P- 165-168. (See also Chem. Xews, Lonch, 1906, 
v. 94.) 
Bishop, H. B., outlines a method for the estimation of minute 
quantities of arsenic in sulphuric acid and in other substances soluble 
in or decomposed by hot concentrated sulphuric acid. The special 
advantages claimed are that large samples may be taken, compara- 
