330 



PHYSIOLOGY OF BACTERIA 



another possibility, namely a lower ash content of the 

 spores which would decrease the rate of coagulation of 

 protein. 



(d) DEATH BY HEAT IN CONCENTRATED SOLUTIONS 



That partial dehydration protects the cells against 

 the influence of heat, can be shown in some (unpublished) 

 data which, in 1911, Mrs. Coffeen made upon the 

 author's suggestion. Bacteria were suspended in broth; 



