462 WEST AFRICAN FORESTS AND FORESTRY 
is Ochrocarpus Africanus, which has the large edible fruit known as 
the African Mammee Apple. This also yields large nuts of an uncertain 
value, which are apparently oil or fat bearing. 
Garcinia conrauna.—The nuts of this, the false or bitter Cola, besides 
yielding an edible fruit, are used locally, but further investigations 
would show whether they would obtain a regular market as an export 
product. 
Polygalacee, ‘“‘ Cheyi” seed, Polygala butyracea, Heck.—This is 
a common herbaceous plant of West Africa. The seeds yield a valu- 
able edible fat. They are about a fifth of an inch long and a tenth 
of an inch broad. The seeds are of a brownish-black outside and 
a greenish-yellow inside. According to the investigations of the 
Imperial Institute ‘‘ the seeds yielded 39-7 per cent. of a soft yellowish 
fat. The taste of it was pleasant, and there was no odour.” According 
to the Imperial Institute analysis the “‘ Cheyi” fat showed : 
Present Sample. menus previously 
Melting-point Fee ie oe A 36° C. _ 
Specific gravity at 100/15 5° C a a8 an 0° 866 —_ 
Acid value .. ‘ ea a a 1:24 11-4 
Saponification value oe oe aes <a 251:0 253-0 
Todine value oe we sie ae we 52°5 49-4 
Titer test .. si a ye ee ie 37°85° C. — 
Hehner value : aa a ae ahs 85°6 — 
Reichert-Meissl Maine oa ae se — 45°6 45°56 
“The edible fat manufacturers stated that ‘ Cheyi’ fat was suit- 
able for their purpose if it could be proved that it did not contain 
a poison, and valued the seeds at £13 to £14 per ton. The oil- 
seed crushers valued the seeds at £12 per ton in the United 
Kingdom.” 
N.O. Bixacee, according to Thonner, Flacourtiacexe, Oncoba echinata, 
Oliver.—This tree bears a large number of seeds, which are known as 
“Gorli ” seeds. The seeds are long and irregularly shaped, and vary 
from a quarter to three-eighths of an inch long, and from one-eighth 
to three-sixteenths of an inch broad. The stiff husk is brown in colour. 
The seeds without husks are white, waxy and soft. According to 
the Imperial Institute investigations the seeds contain 46:6 of fat, 
which is hard, white and crystalline. Although the soap made from 
it was satisfactory, it did not lose the very peculiar odour which the 
fat has. The cake and fat cannot be used asa food because of the large 
amount of chaulmoogrie acid contained in it, an acid which causes 
vomiting. The fat might possibly be of value in eandle-making. 
According to the Imperial Institute analysis the seeds showed : 
