COCOA BY-PRODUCTS 19 
Sulphur to the extent of 0.2 to 0.3 per cent was found in the 
four press cakes examined as to fuel value. 
The values reported for total nitrogen in Table 3 (for which 
ammonia equivalents are given in Tables 2, 4, and 5) are for total 
organic and ammoniacal nitrogen. These figures, however, may 
be accepted as representing the total nitrogen content, as the deli- 
cate diphenylamine test for nitrates showed hardly a trace of 
nitrate-nitrogen to be present in the cakes. " Ammonia " is the 
term commonly used in the fertilizer trade to cover the total nitro- 
gen content of a product. 
