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. 



