121 
Arny, H. V., points out that the volumetric assay process, while 
admirably exact, is somewhat costly, in that 50 c. c. of glycerin must 
be used for each operation. — Am. J. Pharm., Phila., 1906, v. 78, p. 16. 
The Ph. Brit. Committee of Reference in Pharmacy suggests that 
titration of boric acid with alkali in presence of glycerin might be 
substituted for the present quantitative test, and should indicate 98 
per cent at least. No test for free sulphuric acid at present. — Chem. 
& Drug., Bond.. 1906, 69, p. 862. 
Manning and Lang ( J. Soc. Chem. Inch, 1906, v. 25, p. 397 ; from 
J. Chem. Soc., 1906, v. 90, p. 191) propose a method for the quantita- 
tive analysis of boric acid, alone or in the presence of phosphoric 
acid. It involves the separation of boric acid as a trimethylic ether 
and its gravimetric estimation as a salt of barium. — Abstr. in J. de 
pharm. et de chim., 1906, v. 24, p. 424. 
Wolf rum and Pinnow discuss the sensitiveness of the boric acid 
reaction with curcuma paper, and report a series of experiments 
with curcuma paper made according to the directions suggested by 
different investigators. — Ztschr. f. Enters. d. Nahr. u. Genussm., 1906, 
v. 11, pp. 144-154. 
Jorgensen, Gunner, discusses the titration of boric acid and replies 
to some criticisms by A. Beythien. — Ibid., v. 11, pp. 154, 155. 
Fendler, G., presents a comprehensive study of the tests for boric 
acid and particularly of the official (German) method prescribed for 
the detection of this substance in meats and meat products. — Arb. 
a. d. pharm. Inst. d. Univ. Berl., 1906, pp. 296-318. 
Cribb and Arnaud outline a simple method for the approximate 
determination of boric acid as a useful check on the results obtained 
by other methods. — Analyst, Bond., 1906, v. 31, pp. 147-149. 
La Wail, Chas. H., presents some notes on the detection of boric 
acid, in which he discusses the shortcomings of the several methods 
now in use and the precautions to be taken. — Proc. Pennsylvania 
Pharm. Ass., 1906, pp. 169-171. 
Bigelow, W. D., outlines the provisional methods for the determi- 
nation of boric acid and borates adopted by the Association of Official 
Agricultural Chemists. — Circ. Bur. Chem., U. S. Dept. Agric., No. 
28, 1906, p. 7. 
A New Jersey correspondent writes that he is unable to procure 
boric acid soluble in 18 parts of water as required by the U. S. P. 
VIII. His most soluble sample is dissolved by not less than 20 parts 
of water. — Drug. Circ. & Chem. Gaz., N. Y., 1906, v. 50, p. 59. 
Caspari, Chas. E., reports 15 samples examined : 5 U. S. P. ; 1 con- 
tained chloride; 4, metallic impurities; and 5 sulphate. — Proc. Mis- 
souri Pharm. Ass., 1906, p. 99. 
