70 



MORPHOLOGIC VARIATION 



table. Not a sufficient number of cells was obtained before the 

 first two and one-half hours to make quantitative studies of the size 

 of the cells, but from then on such observations of morphologic 



o 



\ Average Length of Cells 



10 



12 



Ik 16 

 Hours. 



Fig. 14. Growth Curve and Variations in Size of Cells o? B. megatherium: 



Culture I. 



characters were made. The results were subjected to statistical analy- 

 sis, and are presented in Table VIL In Figure 14 the rate of growth, 

 as indicated by the logarithms of the number of cells, is plotted 



