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Mann (267) in 1935 published a very complete review of the 
pyrethriris, rotenone and nicotine. Tilemans (406) in 1936 published 
a review of the use of rotenone with 114 references. 
Silva-(376) in 1935 wrote of Brazilian timbo as a source of 
rotenone, and Caminha (36) in the same year published a review of 
information on timbos. The United States Department of Commerce 
(431) has called attention to Caminha' s paper. 
Morales y Valcarcel (286) of the Agricultural Experiment 
Station of Santiago de las Vegas, Cuba, in April 1935, published a 
popular account of rotenone and of the principal plants in which it is 
found, namely, Derris, Lonchocarpus and Tephrosia. A list is given 
of insects, arranged according to host plant, against which derris has 
been used. 
Lecointe (259) in 1936 reviewed information on the rotenone- 
bearing plants Lonchocarpus, Derris and Tephrosia from the Amazon 
Valley. 
Martin (269) in 1937 published an excellent review of Derris, 
Lonchocarpus, Tephrosia and Mundulea with special reference to their 
chemistry and methods for their evaluation. 
Wille, Ocampo, Y.'eberbauer and Schofield (471) have recently 
published a bulletin of 117 pages, 26 figures and 163 references on 
cube and other barbaacos of Peru. The following topics are discussed: 
the botany, cultivation, chemistry, use as an insecticide, and com- 
mercial importance of cube. 
Clark (81), Assistant Trade Commissioner at Lima, Feru, on 
August 26, 1937, and again later (83) called attention to this bulletin 
of Wille et al. on cube. 
Many reviews and popular articles that mention rotenone, cube, 
timbo, and related plants have appeared in Spanish, Portuguese, French, 
German, and English in recent years. 
The Argentine Republic, in its Boletin de Informaciones Petroleras 
(10), in 1934 briefly reviewed the chemistry, use, and occurrence of 
rotenone in Derris, Lonchocarpus and Tephrosia,. 
Brazilian writers on rotenone and Lonchocarpus include Silva (374); 
Ilabuco de Araujo (290); and de Oliveira (312). 
Krieg (254) in 1934 reviewed inforrnption on rotenone, its action 
on insects, its occurrence in Derris and Lonchocarpiis , etc., with 11 
references to the literature; and Sprengel (391) in 1937, in a review of 
scientific progress in the field of chemical insecticides, made reference 
to work with derris and cube. 
