PLATE 39. 



Bacillus subtilis (Ehrenberg). F. Cohn. 

 (Hay Bacillus.) 



I. Gelatin stab culture, thirty-six hours at 22. 

 II. Gelatin stab culture, eight days at 22. 



III. Agar streak culture, two days at 37. 



IV. Agar stab culture, two days at 37. Stab canal. 



V. Agar stab culture, two days at 37. Surface growth. 

 VI. Agar plate, twelve hours at 37. X 60. Super- 

 ficial colony. 



VII. Agar plate, twelve hours at 37. X 60. Deep 

 colony. 



VIII. Agar plate, twelve hours at 37. Natural size. 



