134 



MORPHOLOGIC VARIATION 



These fluctuations with time, while somewhat irregular and vary- 

 ing considerably in the different cultures, show in general a tendency 



60^1 



Uo 



20 



Alkaline 



I23U56759IO 

 Cell Classes. 



60^ 



IK) 



20 



123^1 5073910 

 Cell Classes. 



60^, 



ko 



20 



UO 



20 



I23U567S9IO 

 Cell Classes 



123^^ 567s 9 la 



Cell Classes 

 Calcium Chloride. 



1231156 789 10 

 Cell Classes. 

 Fig. 35. Frequency Distributions of the Ten Cell Classes in Various 

 Cultures of a Colon Bacillus. 



to the formation of two maxima, one corresponding with the begin- 

 ning of the death phase and one with the end. By computing the 



