plantations during the last decade. Industry will con- 
tinue to prefer the uniform reliability of cleaner and 
more abundant Hevea. 
LITERATURE CITED 
Klippert, W. E., 1942. Small-farm rubber production. Agriculture 
in the Americas 2: 48-53. 
Monachino, Joseph, 1945. Revision of Hancornia. Lilloa 11: 19-48. 
Schery, R. W., 1944. Some secondary rubbers in Cearaé, Brazil. Mo. 
Bot. Gard. Bull. 32: 41-49. 
Ule, Ernesto, 1908. Kautschukgewinnung und Kautschukhandel in 
Bahia. Notizblatt d. Kénigl. bot. Gart. u. Mus. Berlin-Dahlem n. 
41a, Bd. 5. 
Zehntner, Leo, 1914. Estudo sobre as manicobas do Estado da Bahia, 
em relacao ao problema das secas. Inspectoria Federal de Obras 
Contra as Secas (Brazil), Pub. 41, Ser. I, A. 115 pp. 
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