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 f uchsin. 



