Dec. i6, 1918 



Nitrogen-Fixing and Nitrifying Organisms 



611 



Table VI. 



-Effect of toluol upon nitrogen fixation and nitrate accumulation — Contd. 



EV.'iPORATED 



NOT EVAPORATED 



EVAPORATED 



" Nitrogen fixed in milligrams per 50 cc. of culture, b Nitrates in milligrams per 100 gm. of soil. 



It will be observed that in the experiments the results of which are 

 presented in Table IV the highest quantity of carbon disulphid and 

 toluol used was without effect upon either Azotobacter or nitrate accum- 



