112 



MORPHOLOGIC VARIATION 



Since spore formation is a characteristic of the resting phase, 

 the rate of spore formation should be influenced by those factors 



Log. of 1:0. of Cells __ 

 Log. of Ko. of Spores 



12 



2k 

 Hours. 



36 



14S 



Fig. 



31. Relation of Rate of Spore Formation to Rate of Growth in 

 B. megatherium. 



which also tend to influence the rate of growth and the form of 

 the growth curve. Migula has determined that spore formation 



