448 WEST AFRICAN FORESTS AND FORESTRY 



According to the very valuable investigations of the Imperial 

 Institute : 



The proportion of hard seed-coat (by weight), 207 per cent. 



The proportion of kernel in bean (by weight), 79" 3 per cent. 



The amount of oil contained in the whole, 31 '2 per cent. 



The amount of oil contained in the kernels, 39 per cent. 



When the oil is left to stand it deposits a quantity of solid fat. 

 On trial, the oil was found to yield rather a soft soap, and was stated 

 to be worth only about £21 per ton. The cold-pressed oil was of a 

 golden yellow colour, and the hot-drawn oil a dull yellow and rather 

 thick. From analysis it was found that the meal was very nutritious, 

 containing over 39 per cent, of proteids, and if it could be used as a 

 feeding-cake it would be worth from £5 to £5 10s. per ton (pre-war 

 rates). 



The constants of the oil from the Southern Nigerian seeds are ; 



Iodine value 87-07 



Acid value . . . . . . . . ..14*3 



Titer test 50-15° C. 



The composition of the meal after extraction of the oil is 

 follows : 



Moisture . . 



Ash 



Proteins . . 



Fibre 



Sugar (dextrose), 



Carbohydrates (other than sugar) 



Per cent. 



12-9 

 3-5 



34-8 

 6-8 

 6-2 



33-7 



The oil on analysis gave the following results : 



Specific gravity at 155° C. (60° F.) . . . . 0-9194 



Saponification value .. .. .. .. 184*2 



Free fatty acids, per cent. .. .. .. 0-7 



Analysis of pressed cake 



Oil .. 



Moisture 



Crude proteins 



Carbohydrates 



Fibre 



Ash.. 



Per cent. 



120 



9-9 



33-2 



34-8 



5-7 



4-5 



The oil would make a first-class edible oil. The value of the 

 beans is stated to be about £6 per ton c.i.f. London, August 1909, 



