48. 
British Guiana, by Messrs. Harrison and Jenman, for the years 
1891-92, p. 70 :— 
"e tuberosus and P. a ngulatus. —“ Yam beans." These 
beans, when stare re being, in re poisonous. They have been 
used, r m very young, pese ve e ed as French beans 
The 
—— Tubers. Seed. 
Water se 5 Je = - 82:25 13°50 
Fats - xs H - - "50 25°04 
esin o+- - - - *13 2-14 
* Albuminoids - - - E 1:05 20:94 
os - z s 29 6*95 
Glue z s - 26 -31 
Pectose gums, &e. - - - 1°62 1°58 
- - - 8*46 a 
Digest fibre an we Tre > 2°14 12:20 
- - *66 4 
A Conf anes = - - - - 1:84 3°91 
100°00 100*00 
Prep os rappin - - - : *166 3°35 
* Both the tubers and beans contain a poisonous resin, the latter yielding ov over 
two per cent. of it. This resin was found to be a very active fish poison. Apart 
from the presence of this substance, the beans exhibit a very high value as food. 
stuffs, much resembling in composition the celebrated Soy-bean (Glycine Soja). 
