93 
Kirk, Edward C., recommends the use of lactic acid for the re- 
moval of tartar, for which it has advantages over sulphuric acid. — 
Ibid., p. 753. 
Chandler, Swithin, recommends the use of lactic acid as an injec- 
tion in cases of acute as well as chronic gonorrhoea in the female. — 
J. Am. M. Ass., Chicago, 1905, v. 45, p. 1071. 
ACIDUM NITRJCUM. 
Herting, Otto, discusses the composition of nitric acid, the mate- 
rial from which it is made, and the average composition of this mate- 
rial. — Deut.-Amer. Apoth. Ztg., 1905, v. 26, p. 128. 
Winteler, F., discusses the economic questions involved in the com- 
mercial production of nitric acid. — Chem. Ztg., Cothen, 1905, v. 29, 
pp. 689, 820. 
Guttmann, Oscar, makes some additional explanation in connec- 
tion with the points raised by Winteler on the economic production 
of nitric acid. — Ibid., p. 934. 
Ferguson, W. C., gives a table of specific gravity of nitric acid 
varying in composition from 14.49 to 95.80 per cent of HN0 3 . — 
J. See. Chem. Ind., Lond., 1905, v. 24, p. 785. 
Lunge, G., controverts the criticism made by Winteler on the esti- 
mation of nitric acid by means of the specific gravity. — Chem. Ztg., 
Cothen, 1905, v. 29, p. 933. 
Stavenliagen, A., discusses the oxidation of nitrogen by means of 
the discharge of high tension electrical currents, reviews the sub- 
ject, and records some experiments that were made. — Ber. d. deutsch. 
chem. Gesellsch., 1905, v. 39, pp. 2171-2177. 
Witt, O. X., reviews the work in connection with the utilization of 
atmospheric nitrogen. Also an account of the practical applica- 
tion of the work, as carried out in Norway in the production of 
nitric acid and nitrates.— Apoth. Ztg., Berlin, 1905, v. 20, p. 1009. 
Kiister and Muench record some experiments made in the produc- 
tion of absolute nitric acid, in the form of snow white crystals, at a 
temperature below — 41° C. These crystals melt to a yellowish liquid, 
containing nitrogen pent oxide and water. — Ztschr. f. anorgan. Chem., 
1905, v. 43, pp. 350-355. 
Rumpf, K., comments on the proposed use of colorless, fuming 
nitric acid in place of the official (German) fuming nitric acid and 
points out that the colorless acid will serve for many of the tests that 
are provided for the ordinary red acid, though it does have some 
characteristics that would appear to differentiate it from the latter. — 
Pharm. Ztg., Berlin, 1905, v. 50, p. 640. 
Gutbier, A., reviews the available methods for determining nitric 
acid and nitrates and recounts some experiments made with 
