PLATE 69 



A. — Mannite-nitrate agar slants, 8 days old, from left to right: soybean bacteria, 

 vetch bacteria, and Bacillus radiobacter . 



B.— Growth in milk, 4 weeks old from left to right: soybean bacteria, vetch bac- 

 teria, and B. radiobacter. 



C. — Growth on potato, 2 weeks old: vetch bacteria (left) and B. radiobacter (right). 



