CELLS OF THE COLON BACILLUS 



91 



the cells with the lowest area-length index, that is the most slender, 

 and the cells of greatest area-length index, at the top of the columns 

 (i.e. those approaching spherical form), are also for the most part 

 the shortest. 



I I I I I I I I I I I 



I I I I I I 





I I I I 



I I I I 



I I I I I ' I I 1 



Fig. 27. Correlation Graph of Length of Cells Against Area-length 



Index, B. coli. 

 Ordinates, 1 unit = 3\i (Length). Abscissae, 1 unit = 3 (Area-length Index). 

 Solid dots represent cells from eighteen-hour sample, hollow dots cells from 

 three-hour sample. 



Frequency distribution curves for the length of the cells are 

 presented in Figure 26, together with curves for the distribution of 



