102 INFLUENCE Of TEMPERATURE 'ON BACTERIA 



cells which contain considerable fat, and this may be the reason 

 why some spores which contain an oily substance are especially 

 sensitive to light. Death of the cell in many cases may be due to a 

 type of coagulation like heat coagulation, for Bovis has shown that 

 protein solutions in quart vessels are coagulated by exposure to 

 ultra-violent light. This consists of two stages first, that of dena- 

 turation, and second, agglutination, or flocculation. 



