- 14 - 
51. TATTERSFIELD, F. , and ROACH. W. A. 
1923. The chemical properties of Derris e lliptica (tuba root). 
Ann. Appl. Biol. 10: 1-17. 
52. U. S. DEPT. AGR., BUR. ENT. AND PLANT QUARA_NTINE, DIVISION OF INSECTI- 
CIDE INVESTIGATIONS. 
1933-1934. Unpublished reports. 
53. U. S. DEPT. AGR., PUERTO RICO EXPT. STATION. 
1937. Report of the Puerto Rico Experiment Station, 1936. 103 pp. 
54 . 
1938. Report of the Puerto Rico Experiment Station, 1937. 115 pp. 
55. 
1940. Report of the Puerto Rico Experiment Station, 1939. 126 pp. 
56. WORSLEY, R. R. Le G. 
1934. The insecticidal properties of some East African Plants. I. 
Ann. Appl. Biol. 21; 649-69. 
57, 
58. 
59. 
1936. Rotenone. I. The determination of rotenone. Jour. Soc, 
Chem. Ind, 51: 349T-57T. 
1937. The insecticidal properties of some East African plants. 
III. M undulea suberosa, Benth. Part 2, Chemical con- 
stituents. IV. Mundulea suberosa Benth. Part 3, Varia- 
bility of samples. Ann. Appl. Biol. 24: 651-64. 
1939. The histology and physiology of rotenoids in some Papili- 
onaceae. I. Ann. Appl. Biol. 26: 649-83. 
