PLATE 67. 

 Actinomyces chromogenes. Gasperini. 



I. Gelatin stab culture, six days at 22°. 

 II. Agar streak culture, six days at 22°. 



III. Agar stab culture, six days at 22°. Stab canal. 



IV. Agar stab culture, six days at 22°. Surface growth. 

 V. Gelatin plate, eight days at 22°. Natural size. 



Appearance upon white background. 



VI. Gelatin plate, eight days at 22°. Natural size. Ap- 

 pearance upon dark background. 



VII. Gelatin plate, eight days at 22°. X 60. Part of a 

 superficial colony. 



VIII. Agar plate, four days at 22°. X 60. Superficial 

 and deep colony. 



IX. Potato culture, three days at 22°. Natural size. 

 X. Microscopic preparation. Pure culture in bouillon, 

 three days at 22°. X about 1000. Stained with fuchsin. 



