404 



J. RUSSELL ESTY 



g. Thermal death point to cultures isolated from feces and 

 milk. Tables 7 and 8 show the variation in thermal death 

 point of cultures freshly isolated from milk and feces when sub- 

 jected to the same conditions. Of 25 cultures from market 

 milk all survived 56°, 18 survived 57°, and eight survived 58°; 



TABLE 5 



Thermal death points. Cultures freshly isolated from human feces and grown for 

 eight hours and twenty-four hours in glucose-liver broth and sixty-six hours in 

 sterile milk 



Spores did not survive 100°C. in any strain. 



of 55 cultures from human feces, all survived 59°, 21 survived 

 60°, and five survived 61°; of 18 cultures from cow feces, all 

 survived 59°, 16 survived 60°, 13 survived 61°, and five sur- 

 vived 62°; and of 18 cultures from horse feces, all survived 

 57°, 11 survived 58°, ten survived 59° and three survived 60°. 



