Effect of Temperatures on Formation of Hemolysins. 95 



of 85-95 per cent, and injected them with doses of typhoid, 

 paratyphoid, dysentery and colon bacilli and cholera spirilla 

 which were not fatal for normal animals. All the guinea pigs thus 

 treated died in 4-26 hours, while, of control animals exposed to 

 the heat alone, without injections, 30 per cent, succumbed. 



I 2 3 4 5 6 7 



WEEKS 



Fig. r. 



