61 
An abstract (from Apoth. Zt g.) gives a simple expedient used by 
Eschenburg for the prevention of ruptures in folded filters. Before 
fully expanding the filter a piece of string is loosely tied around the 
folds a short distance above the point, which is then well inserted into 
the neck of the funnel and the filter spread out, moistened, and filled 
as usual. — Ibid., v. 54, p. 594. 
13. COLOR STANDARDS AND COLORS. 
Wiebelitz, H., in discussing the revision of the Ph. Germ., points 
out that in providing for color tests or in describing the color of a 
preparation it would be desirable to outline some general method 
and to prescribe the bulk or the thickness of the liquid to be ob- 
served. — Pharm. Ztg., Berl., 1906, v. 51, p. 1003. 
An unsigned article describes and figures the Ivennicott- Sargent 
colorimeter which is claimed to combine accuracy of determination 
with rapidity of operation. — Chem. Eng. Phila., 1906-7, v. 5, pp. 
213-214. 
Blarez, Ch., outlines a method for determining the density of color 
solutions. — Bull. Soc. de pharm. de Bordeaux, 1906, v. 46, pp, 
296-298. 
Several reports from the associate referees on food adulteration 
discuss the behavior of colors with reagents and outline methods for 
differentiating the commercial colors claimed to be vegetable from 
colors of coal-tar origin. — Proc. Off. Agric. Chem., 23d Ann. Conv., 
pp. 11-14. (Bull. Bur. Chem. U. S. Dept. Agric. 1907, No. 105.) 
Berry, W. G., presents an exhaustive compilation of the coloring 
matters that may occur in foodstuffs and methods for their detection. 
The colors are classified as (1) coal-tar lakes, (2) natural colors of 
vegetable and animal origin, (3) organic lakes, (4) mineral pigments, 
and (5) coloring compounds. Methods of analysis for various prod- 
ucts are given in detail. — Circ. Bur. Chem. U. S. Dept. Agric. 1906, 
No. 25, p. .40. 
Janny, A., discusses the bearing of the Pure Food and Drug Law 
on the use of coal-tar colors and points out that while vegetable 
colors are themselves impure and not infrequently contaminated with 
objectionable materials the same colors when made from coal tar 
may be produced chemically pure, but would still be interdicted by 
the letter of the food and drug law.— Oil, Paint and Drug. Rep., 
I 1906, v. 70, November 5, pp. 29-30. 
ji 
14. ANALYTICAL METHODS AND RESULTS. 
La Wall, Charles H., commenting on the recurring tests for various 
salts, says that much space could have been saved by giving these in 
some one place and referring to them as need be under the chemi- 
cals. — Am. J. Pharm., Phila., 1906, v. 78, p. 99. 
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