- 146 - 
212. ILLINOIS AGRICULTURAL EXPERIMENT STATION 
1937. Directions for spraying fruits in Illinois. 111. Agr. 
Expt. Sta. Circ. 447, 25 pp., illus. 
213. IMPERIAL CHEMICAL INDUSTRIES, LTD. 
1936. Procede de fabrication de la rotenone et des substances 
associees en partant des produits naturels qui en 
contiennent. French. Patent 797,052; issued April 20, 1936; 
applied for October 29, 1935; in England, October 29, 1934. 
214. ~~-*i..._^ ., -r *■ ,.; 
1937. Rotenone production. Canad. patent 369,499; issued October 26, 
1937; applied for October 28, 1935. (E. W. Fawcett, assignor.) 
215. IMPERIAL INSTITUTE 
1907. The occurrence cf indigo in the "Gara Plant" of Sierra Leone. 
Bull. Imp. Inst. 5: 129-130. 
216. 
1909. Indigo from Nigeria. Bull. Imp. Inst. 7: 319-320. 
217. —»_;...,,».. 
1934. Derris roots from New Guinea. Bull. Imp. Inst. [London] 
31: 459-472. 
218. JOHNS-MANVILLE 
1938. Colite no. 209, the ideal extender for insecticides. 3 pp., 
mimeo. Johns-Manville, 22 East 40th St., New York, LI. Y. 
219. JONES, H. A. 
1936. The optical rotatory power of extracts of derris and 
cube roots. Jour. Agr. Res. 53: 831-839. 
220. 
1937. Chemical evaluation of derris and cube roots. U. S. Dept. 
Agr. , Bur. Snt. and Plant Quarantine News Letter 
4 (3) : 23, mimeo. 
221. 
1937. Determination of rotenone in derris and cube. Crystallisa- 
tion from extracts. Indus. Engin. Chem. 9: 206-210. 
222. JONES, H. A. 
1937. Insecticide. U. S. Patent 2,103,195; issued December 21, 1937; 
applied for July 3, 1937. 
223. 
1938. Effect of insect attack on the rotenone content of stored 
cube root. Jour. Econ. Ent. 31: 127. 
224. 
1938. Effect of insect attack on rotenone content of stored cube 
root.. U. S. Dept. Agr., Bur. Ent. and PI. Quarantine 
News Letter 5 (5): 27, mimeo. 
