EXPERIMENTS WITH BACTERIAL ENZYMES 145 



hardening is simply an early stage of digestion, and is followed under 

 favorable conditions in all liquefying species by a state of permanent 

 fluidity. 



10. The bacterial hemolysins and bacterial gelatinases are entirely 

 distinct. In no case is there reason to believe that the bacterial gela- 

 tinases can produce hemolysis. 



