99 
difference of 2° or 3° will make a corresponding difference in the 
stability of the resulting glycerin suppositories. — Bull. Pharm., De- 
troit, 1905, v. 19, p. 317. 
ACIDUM TANNICUM. 
Francis, John M., calls attention to the fact that much inferior 
tannin is available and should be guarded against. He believes this 
inferior product to be made by some of the more economical processes 
and probably some cheaper solvent used in the final conversion of the 
substance into scales. — Bull. Pharm., Detroit, 1905, v. 19, p. 318. 
Kebler, Lyman F., reports finding tannin which contained much 
resinous matter. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 182. 
Thoms, H., reports a study of the tannins. He reviews the litera- 
ture and the theories that have been advanced, reports some investiga- 
tion into the composition of tannin and its relation to other com- 
pounds, and makes some suggestions upon the estimation of tannin. — 
Ber. d. pharm. Gesellsch., Berlin, 1905, v. 15, p. 303. 
Virchow, C., discusses the precipitation of tannins by ammonium 
salts. — Ibid., p. 348. 
Trotman and Hackford (Chem. Ztg., 1905, p. 1189) suggest that, in 
place of the generally variable hide powder for the estimation of 
tannin, strychnine be used. They point out that a 1 : 10000 solution 
of tannin will still give a distinct reaction with the alkaloid strych- 
nine. — Apoth. Ztg., Berlin, 1905, v. 20, p. 933. 
Utz outlines a method for the valuation of tannin and records a 
series of experiments. — Ibid., p. 907. 
Williams, Walter S., outlines a method for the valuation of tannin 
from the view point of the dyer and calico printer. Among the sev- 
eral materials discussed are commercial tannic acid, sumach, catechu, 
and gambir.— J. Soc. Chem. Ind., Lond., 1905, v. 24, pp. 877-879. 
Hommell, Philemon E., presents a tabulated list of drugs, official 
and non-official, which contain tannin, the parts of the plants which 
contain it, and, in a few instances, the percentage. — Proc. N. J. 
Pharm. Ass., 1905, pp. 61-66. 
Winkel, Max, demonstrates that, contrary to the usual teaching, 
fruit — that is, the fleshy portion of fruit — contains considerable 
tannin in the form of a glucoside. From an aqueous extract of the 
fruit this substance is precipitated by powdered hide, solution of 
gelatin, and also by lead acetate. — Pharm. Post, Wien, 1905, v. 
38, p. 358. 
ACIDUM TARTARICUM. 
Herting, Otto, discusses the origin and tests for tartaric acid and 
includes a table indicating a systematic method for the separation of 
oxalic, tartaric, citric, and malic acids. — Deut.-Amer. Apoth. Ztg., 
N. Y., 1905, v. 26, p. 114. 
