- 156 - 
335. PRENTISS, R. J. , & CO., INC 
1935, Rotenone content- of dusts. Important that manufacturers 
place less emphasis on rotenone analysis and more on 
total toxicity. Derris Developments no. 5, 4 pp. 
336. PREUSS 
1903. Die TTirkung eines Tornados in dem botanischen Garten zu 
Victoria auf die dort angepflanzten G-ewachse. 
Tropenpflanzer 6: 338-341. 
337. PULLE, A. 
1906. An enumeration of the vascular plants known from Surinam 
together with their distribution and synonymy. 555 pp., 
illus. Leiden. 
338. ---• *-— . 
1933. Novitates taxonomicae I. Rec. Trav. Bot. Nee r land. 
30 (2-4): 163-184. Amsterdam. 
339. RAUCOURT, M. 
1936. Les produits nouveaux utilises' par 1' agriculture comme 
antiparasitaires. Chim. et Indus. [Paris] 35: 1263-1275. 
340. RICHARDSON, H. H. 
1935.. The effectiveness of various derris and cube products 
for control of the red spider on greenhouse plants. 
Jour. Econ. Ent. 28: 1076-1078. 
341. RICHTER-ANSCFJTZ 
1935. [Derivata dos Bonzopyrans. ] Chemie der Kohlenstoffverbindungen 
Oder organishe Chemie. ed. 12, v. 2: 506-513. Leipzig. 
343. ROAHK, R. C. 
1932. A digest of the literature of derris (deguelia) species 
used as insecticides, 1747-1931. U. S. Dept. Agr. 
Misc. Pub. 120, 86 pp. 
343. 
344. 
1934. C race a virginio. na. U. S. Dept. Agr., Bur. Chen, and 
Soils form letter; 
1934. Devil's shoestring (Cracca virginiana L. ) . A potential 
source of rotenone and related insecticides. U. S. 
Dept. Agr., Bur. Chem. and Soils, Insecticide Dav. , 
12 pp . , mimeo . 
345. 
1934. Insecticides and fungicides. Ann. Surv. Aner. Chem. 
(1933) 8: 221-242. New York. 
