120 
differentiation they mix intimately, in a mortar, 5 gm. of the product 
with 5 gm. carbonate of soda, absolutely free from Cl; ignite, to the 
complete combustion of the organic matter, in a platinum crucible; 
allow to cool: treat with hot distilled water, filter, acidify with 
HN0 3 , and add nitrate of silver. The natural acid gives only an 
insignificant chlorine reaction, while that with the synthetic is quite 
visible and characteristic. — Ann. cle chim. analvt., Paris, 1906, v. 11, 
pp. 243, 244. 
Belloni, E. L., questions the value of the above observations. — Ibid ., 
p. 370. 
Cormimboeuf and Grosman reaffirm their proposition, quoting from 
the English, German, and Italian pharmacopoeias. They assert that 
there is in commerce no synthetic benzoic acid which does not contain 
chlorine. — Ibid ., 463. 
Blarez, C. H., outlines a method for detecting benzoic acid in wines, 
using ether as the solvent. — Bull. Soc. de pharm. de Bordeaux, 1906, 
v. 46, pp. 292-295. 
Akiyama, T., has devised a method for separating salicylic acid 
and benzoic acid with a solution of borax and glycerin. He believes 
that 1 part of benzoic acid in 50.000 parts of sake can thus be sepa- 
rated and identified. — J. Pharm. Soc. Japan, 1906, p. 118. 
Bigelow, W. D., outlines the provisional methods for the deter- 
mination of benzoic acid adopted by the Association of Official Agri- 
cultural Chemists. — Circ. Bur. Chem., U. S. Dept. Agric., 1906, Xo. 
28, pp. 5, 6. 
Paietta, Baffaello, records a number of experiments to determine 
the solubility of the benzoates of strontium, potassium, and zinc, and 
gives the solubility of these several salts at different degrees. — Boll, 
chim. farm. Milan, 1906, v. 45, pp. 485-488. 
Brugsch and Hirsch report observations made to determine the 
elimination of benzoic acid in dogs, and conclude that only a minor 
portion of the acid is eliminated as hippuric acid and that quite an 
appreciable portion of the administered benzoic acid leaves the body 
unchanged. — Ztschr. f. expt. Path. u. Therap., 1906, v. 3, pp. 663-674. 
ACIDUM BORICTJM. 
Beichert, Fr., describes the deposits of boron compounds found in 
Argentina and gives the composition and location of the several 
deposits. — Chem. Ztg., Cothen, 1906, v. 30, pp. 150-152. 
Mellor, Ernesy M., presents a description of a trip to the boric 
acid fields of Tuscany and includes a number of illustrations show- 
ing the method of preparing and marketing boric acid. — Brit. & Col. 
Drug., Bond., 1906, v. 49, pp. 269-273. 
