- 143 - 
177. 
178. 
179. 
180. 
181. 
182. 
183. 
184. 
185. 
GRIFFITH; (j. Hl ■ , _.; ■ 
1336. Letter dated M ay ','1933, to G-ruaewald 6c Co., Pichincha 
a Agrismendi, Caracas, Venezuela. 
GUERIN, H, 
1936. La rotennne. Indus. Chim. 23 (275): 885-865. 
(yUILESMIH, J. A., PERROTTET, S. , and RICHARD, A. 
183.0-33. Florae senegambiae tentamen seu 'hi gtaria: plantarum 
in diversis senegambiae regionibus a peregrinatoribus 
perrettet ct leprieur detc-ctaruu. v. 1, 316 pp., illusj 
Paris. 
GTJMILLA; J. ■••.■•■■■,.:'■ 
'1791. 'Historia naturoil 3 civil y geogrofica dc las naciones 
situadas en las riveras' del Rio Orinoco, v. 1, 350 pp. 
Barcelona. - : 
.HAAG, H. B. 
1937. Toxicity of 'rotc-none. A study of the toxicity to humans 
and animals of rotenoho-bGaring products. Soap 
13 (1): 112-c, 112-d, 137. [Abstract in U. S. Dept. 
Agr. Daily Di^eso 54 (32): 3. 1937.] 
HAEGELE, R. Wi „, . 
1934. P. I". A. Codling Moth Project, at Parma, Idaho, 1954. 
11 pp., 8 to. olcs, mini oo. 
HAMILTON, Co C. 
1935. Non-poisonous substitutes for arsenical s. Eleventh Ann. 
Meeting Kat'l Shade Tree Oonf. Froc. , 1935, pp. 83-89. 
1935. Insecticide. U. S'. Patent 2,030,584; issued February 11, 
1935; applied for June 5, 1934. 
186. 
187, 
1938. Tests with derris powder or cube powder in resin residue 
omulsion sprays for the control of shade tree insects. 
Proc. Ann. Meeting Thirteenth Natl Shade Tree Conference 
September 1,.,2, 3, 1957, op. 140-147. 
HAMMER, 0. E. 
1536. An outbreak of bhe gooseberry fruitworm and its control 
with powdered derris and cube root. Jour. Econ. 
Snt. 29..: 215-216. 
HANEIOT, M. 
1307. Sur les substances actives du Tephrosia vogelii . Compt. 
Ren-d. 'Acad.., Sci. [Paris], 144; 150-152. 
HARMS 
1905. Bolusanthus Hams, novum genus e tribu Sophorearum. 
Rcpertorium novarum specicrura regni vegetabilis 
3:" 11-15. 
