- 28 - 
and the stcns 0.6 percent of crude rotcnonc "by the carbon tetrachloride 
method. Cultivated specimens, six years old, of Black Haiari gave 1.4 
percent and of White Haiari 0.9 percent rotcnonc, the stens in "both 
cases containing only traces. A further search for other and richer 
strains of Lonchocarpus in that colony would appear to "be worth while. 
There is always the possibility, as Killip and Smith point out, that t 
in Peru the cube plant, cultivated for centuries as a fish-poison nay 
represent a selected strain in which the content of toxic principles _ 
of the roots is at a naxiriun. 11 
John Powell and Company (332), in letters dated April 28 and July 5, 
1936, presented average analyses of cube and dcrris recently imported by them. 
Material 
Brazilian cube 
Peruvian cube 
Malay derris 
Rotcnonc 
(percent) 
Total extractives by — 
Ether 
(percent) 
5.29 (12)* 19.49 (11) 
5.29 (7) 16.53 (7) 
5.35 (2) 14.07 (2) 
CC14 Acetone 
(percent) (percent) 
20.95 (8) 23.29 (4) 
18.75 (5) 
♦The number of samples analyzed appears in the parenthesis. 
The Federated Malay States Department of Agriculture (143) in its 1936 
report stated that further samples of cube or haiari root ( Lonchocarpus spp. ) 
from plants at Scrdang aged about 36 months wore analysed by the Division of 
Chemistry, C. D. V. Georgi, Agricultural Chemist. Compared with derris, the 
results were again disappointing as the following figures, calculated on a 
moisture-free basis, show. Further, there was no indication of any marked in- 
crease in toxic content with age. 
Type 
Ether Extract 
2 years old 3 years old 
(percent) (percent) 
Black haiari 
7.9 
8.9 
White haiari 
7.7 
8.0 
Chevalier and Chevalier (78) in 1337 reviewed information' on derris and 
cube. The authors have found up to 6,7 percent rotenonc in cube. Peruvian 
cube imported into France in 1936 was more uniform in composition than dcrris. 
Rotcnonc was not below 4 percent and usually was 5 to 6 percent; total extract 
varied from 15 to 19 percent. 
Georgi (161) in 1937 published additional analyses of black haiari 
(Lonchocarpus chrysophyllus Kleinh. ) and white haiari (L. Martynii A. C. Smith) 
introduced from British Guiana and grown in Malaya, 
