322 



( 'ONCMSIONS. 



1. Growth of corn, other factors being constant, seems to be proportional 

 to the rate of humification of manures. 



2. The ammonia soluble matter in cow and steer manure is not apprec- 

 iably increased on 18 months' exposure, but hog, sheep and horse manure 

 humify less rapidly and in the order named. 



