262 
chronic pustular dermatitis with seborrhoea ; circulatory disturb- 
ances. — Ibid., Pt. II, p. 287. 
Additional references on the use of digitalis will be found in the 
Index Medicus and J. Am. M. Ass. 
ELASTICA. 
Esch, Werner, reviews the advances made in the production and 
the utilization of rubber and gutta-percha. The paper contains a 
comprehensive bibliography relating to the various phases of the 
rubber industry. — Chem. Ztg., Cothen, 1906, v. 30, pp. 195-198. 
Schellman, W., reports examining several of the varieties of crude 
rubber produced in East Africa. — Der Pflanzer, Tanga, 1906, v. 2, 
pp. 1-6, 193-207. 
He discusses the cultivation of various rubber-producing trees and 
plants. — Ibid., v. 2, pp. 9-20. 130-137. 
Eismann-Hale, Gust., discusses the cultivation of rubber in East 
Africa. — Ibid., v. 2, pp. 22-29. 
Zimmermann, A., reports his experiments on the production of 
rubber from Manihot glaziovii, discusses the cultivation and the pro- 
duction of rubber from varieties of Castilloa, and presents a list of 
literature relating thereto. — Ibid., v. 2, pp. 30-57, 81-123. 
Harris, W., presents a compilation of information relating to rub- 
ber-producing plants for the use of intending rubber planters in 
Jamaica. — Bull. Dept. Agric., Jamaica, 1906, v. 4, pp. 241-282. 
Moore, J. C., (West Indian Bui., 7, 1906, No. 1, pp. 21-29, figs. 3) 
gives some data on tapping experiments with Castilloa elastica. The 
trees were 15 to 17 years old and the average yield of rubber obtained 
was 11.06 oz. per tree. — Exper. Sta. Rec., 1906, v. 18, p. 148. 
Ahern, G. P., ([Philippine] Bur. Forestry Bui. 3, p. 40, figs. 2, 
map 1) brings together a large amount of material relative to the 
culture, preparation, and uses of ceara, castilloa, and para rubber. — 
Ibid., v. 18, p. 148. 
Additional references on the cultivation and production of rubber 
will be found in Exper. Sta. Rec., v. 18, and in Just’s Bot. Jahresb. 
ELATERINUM. 
Thoms, H., presents some general notes on elaterin, its origin and 
use, and discusses the chemical composition. — Pharm. Zentralh., 1906, 
v. 47, pp. 825-826. 
Berg, A., reviews the work done in connection with elaterin, re- 
ports some additional experiments, and proposes C 28 H 38 0 7 as repre- 
senting the molecule composition. — Bull. Soc. de chim., Par., 1906, 
v. 35, pp. 435M:37. 
v. Hemmelmayr, Franz, discusses the literature relating to elate- 
rin and expresses the belief that the molecular formula C 28 H 38 0 7 
