64, TRANSACTIONS OF THE 
THE CELLULOSE FERMENTS. 
By J. E. GREAVES. 
(Summary. ) 
A critical review of the work which has been done 
with the cellulose decomposing organisms of the soil. It 
indicates the part played by these ferments in soil fertility 
and their relationship to the nitrogen-fixing organisms, 
especially the part which they play in rendering assimilable 
the plant residues to the non-symbotic nitrogen fixers. 
The article points out the rich field that is open to the 
investigator in a study of the inter-relationship existing 
between various species of soil organisms. 
