BY B. GREIO-SMITH. 



665 



trol, a second series received water. The soil had been treated with 

 toluene, and had been heated to 65°. 



Experiment iii. — The Addition ok Bad. vutiduin. 



30— 



ip- 



to— 



I I I 

 1^3 



\0 



14 



4.+ djjxjc 



The expei'iment shows the same rapid rise following the addition 

 of one of the components of the suspension used in Expt. ii., and 

 the control is similar in its behaviour to tlie heated suspension 

 series. As a whole, the experiment tells us that the same general 



