PLATE 68 



A. — Soybean bacteria, J. K. Wilson's strain, 4 days old. 

 B. — Vetch bacteria, 3 days old. 

 C. — Bacillus radiobacter, 2 days old. 

 D. — Soybean bacteria, beef agar, 4 days old. 

 E. — Red clover bacteria, beef agar, 4 days old. 

 F. — Bacillus radiobacter, beef agar, 4 days old. 

 G. — Cowpea bacteria, potato, 6 days old. 

 H. — Red clover bacteria, potato, 14 days old. 

 I. — B. radiobacter, milk, 7 days old. 

 J. — Cowpea bacteria, mannite-nitrate agar, 8 days old. 

 K. — Vetch bacteria, mannite-nitrate agar, 8 days old. 

 L. — B. radiobacter , mannite-nitrate solution, 17 days old. 

 A-C Loeffler's stain; D-L aqueous fuchsin. X 1,000. 



(556) 



