614 



SELMAN A. WAKSMAN 



TABLE 2 



The oxidation of thiosulfate at different reactions 



Medium 8 used as a basis, without any carbonate 



media, it is rapidly broken up as a result of the rapid oxidation of 

 the sulfur to sulfuric acid by Th. thiooxidans. 



In the study of ordinary cultivated soil, the presence of Thio- 

 bacillus B. or organisms closely related in their metabolism is 

 easily demonstrated. The acid compost, which is a mixture of 

 sulfur (5 per cent), rock phosphate (15 per cent) and soil, 



