436 * BOTANICAL GAZETTE [JUNE 
favorable on the side of greater mixture. For the roots together 
with the greater supply of moisture took with this in solution the 
ingredients which existed in greater abundance in the commi- 
nuted soil itself. These beneficial relations also made the forest 
conditions more favorable in another way, and helped to perpet- 
uate them, as they continually added to the humus, for this was 
much more in evidence on the side of the greater mixture. 
CHICAGO, ILL. 
a ee a 
