44 
Harvey, T. F., discusses some temperature corrections for use with 
the Abbe refractometer, and refractive indices of some fixed and 
essential oils. — J. Soc. Chem. Ind., Lond., 1905, v. 24, pp. 717-719. 
13. FILTERS. 
Shimer, Porter W., describes and figures a filter in which he uses, 
in place of the ordinary filter paper, a layer of felt over which he 
spreads a layer of pulped filter paper. — J. Am. Chem. Soc., 1905, v. 
27, pp. 287-292. 
Gaedicke, K., describes and figures a perforated porcelain cone and 
an accompanying funnel which he believes will facilitate rapid and 
exact filtration in quantitative analysis. — Abstr. in Pharm. Ztg., Ber- 
lin, 1905, v. 50, p. 693 (from Allg. Chem. Ztg.). 
14. OXIDATION. 
Schaer, Ed., discusses the influence of alkaline substances on vari- 
ous oxidation processes. — Proc. Am. Pharm. Ass., 1905, v. 53, pp. 
208-215. 
Benrath, Alfred, refers to the oxidizing action of ferric chloride 
in sunlight. — Abstr. (J. pr. Chem., 1905 (II), v. 72, pp. 220-227) J. 
Chem. Soc. Lond., 1905, v. 88, part 2, p. 730. 
Schaer, Ed., reports a comprehensive study of autoxidation as 
manifested in color changes. The report includes data on (1) gallo- 
tannic acid, (2) pyrogallol, (3) chinon, (4) aloin (isobarbaloin, 
Leger), (5) chrysarobin, and (6) brasilin. — Arch. d. Pharm., 1905, 
v. 243, p. 198, ff. 
Ciamician and Silber report on a continuation of previous experi- 
ments on the reduction of nitrobenzene by the aid of light. — Abstr. 
(Ber., 1905, v. 38, pp. 1176-1184 and 1671-1675) J. Soc. Chem. Ind., 
Lond., 1905, v. 24, pp. 461 and 641. 
15. COLOR STANDARDS. 
Schreiner, Oswald, describes and figures a simple colorimeter for 
general use and includes some additional remarks on colorimetric 
methods and apparatus. — J. Am. Chem. Soc., N. Y., 1905, v. 27, pp. 
1192-1203. 
In an unsigned article a colorimeter designed ly Otto Bismer is 
described and illustrated. — Oesterr. Chem. Ztg., 1905, v. 8, p. 277. 
Lyons, A. B., describes some new color reactions. — Proc. Am. 
Pharm. Ass., 1905, v. 53, pp. 329-332. 
Kraemer, H., discusses the origin and nature of color in plants. — 
Proc. Am. Philos. Soc., 1905, v. 43, 257-277. 
16. ALKALINITY OF GLASS. 
Baroni (Giorn. Farm. Chim., v. 53, p. 481) describes an easy 
method of testing the neutrality of glass, which depends on (1) the 
