Dr, Fickendey 69 , 
is generally to be met with in fruits containing 
tannic substances, as, for instance, in apples, 
in which the colour or discolouration that results 
DR. FICKENDEY, AGRICULTURAL DEPARTMENT. 
CAMEROONS, GERMAN WEST AFRICA. 
from being cut is caused by the oxidation of 
the tannic substances in the fruit. The query 
as to whether a kind of leathery formation 
