BY R. GREIG-SMITH. 



733 



infectant aired off in the morning". The same soil, without treat- 

 ment, as well as raw soil taken upon the following morning, were 

 also tested. 



Experiment ix. 



The toxicity of the soil is undoubted, and portions were used 

 with varying quantities of water for extraction. The effect of 

 chloroforming the soil is well seen.* 



Having obtained a toxic soil, the extraction, with varying 

 amounts of water, was continued. 



Experiment x. 



Five (22°) and eight (28°) days later, the same sample of soil 

 was used, as the employment of fresh soil was prevented by the 

 prevalence of rain. The tests were incubated overnight at 22° and 

 at 28°. 



Experiment xi. 



• Compare these Proceedings, 1910, 814. 



