274 Culture Chaeacters 



Reaction of media (Puller's scale) -\- or 



Gelatin plate: Grown 24 hours at °C. 



(a) Surface Colonies. i (b) Deep Colonies. 



Sketches. 



Agar plate: Grown 21 hours at 



(a) Surface Colonies. 



(b) Deep Colonies. 



Sketches. 



Special Media: (Such as litmus milk and blood serum.) 



