Feb. as. 1918 



Infltcence of Carbonates on SoU Bacteria 



477 



From his study of B. subtilis, he concluded that no antagonism exists 

 between calcium and magnesium. In a later publication Lipman (39) 

 gave an extensive review of the literature bearing on the subject of the 



Fig. 6. — Diagram showing the influence of magnesium carbonate on the number of bacteria in Plainfield 



sand. 



i=no treatment. 



2= one-fourth magnesium carbonate. 



3-= one-half magnesium carbonate. 

 4= full magnesium carbonate. 



proper lime-magnesia ratio in soils. He concluded that there is little 

 evidence to support this hypothesis of the lime-magnesia ratio. In accord 

 with Lipman's results, certain investigators {28 ^ 29) showed that various 



