- 137 - 
108. 
1937. Cube consumption increased — Peru, U. S. Dept. Com., 
Bur. Foreign and Dom. Com. , World Trade Notes on 
Chemicals and Allied Products 11 (13): 203. 
109. CROSBY, C. R. , and CHUPP, C. 
1934. The control of diseases and insects affecting 
vegetable crops on Long Island. N. Y. State Col. Agr. 
Cornell Ext. Bull. 278, 87 pp. 
113. CUPPLES, H. L. . 
1938. A list of proprietary detergents, wetting agents, and 
emulsifying agents. U. S. Dept. Agr., Bur. Ent. and PI. 
Quarantine, E-426, 24 pp., mimeo. 
111. DANZEL, L. 
1937. Notes pratiques sur le "Derris" insecticide. Bull. 
Sci. Pharmacol. 44: 108-144. 
112. DELASSUS, M. , LEPIGRE, A., end PASQUIER, R. 
1933. Les ennenis de la vigne en algerie et les moyens pratiques 
de les combattre, Tome 1. Les parasites animaux. 
249 pp. , illus. 
113. DENNIS, W. J. 
1935. Cube-barbasco. Vest Coast Leader, Lima, Peru, August 27, 
pp. 21-22; Sept. 3, pp. 1-2. 
114. 
1937. Cube-barbasco. Peru may lose promising export trade. West 
Coast Leader, Lima, Peru., Sept. 28, pp. 14-15. 
115. DERRIS, INC. 
1937. Price lists, effective October 1, 1936, and February 
10, 1937. 
116. DIETZ, H. F. 
1938. - The use of plant extractives or dried ground plants in 
insect control offers a broad field for research. 
Agr. News Letter (duPont) 6 (1): 1-6. January. 
117. DOELxN, T. R. 
1937. Insecticide. U. S. Patent 2,096,885; issued October 26, 
1937; applied for October 21, 1933; assigned to Stanco Inc. j 
118 DRAKE, N. L. , and SPIES, J. R. 
1932. The toxicity of certian plant extracts to goldfish. Jour. 
Econ. Ent. 25: 129-133. 
