546 



Journal of Agricultural Research 



Vol. XX, No. 7 



Table I. — Development of cow pea-soybean bacteria, Bacillus radicicola {from clover, 

 ■vetch, etc.), and B. radiobacter 



Substrates. 



Cowpea-soybean bacteria. 



Mannite-nitrate agar slant. 



Macroscopic examination. — Raised whitish to porcelain white, glossy 

 layer. 



Microscopic examination. — After 3 days slender rods, sometimes curved; 

 after 7 to 10 days unstained, irregular sheaths, with 1 to 4, most frequent- 

 ly 2, darkly stained granules; after 2 to 3 weeks many small globules, 

 ovals, and short rods outside of the unstained sheaths, also small globular 

 regenerative bodies. 



