276 MICRO-ORGANIS^ilS AND DISEASE [chap. 



during or shortly before or after narcosis (Klein and 

 Coxwell). Petruschki has shown that by keeping frogs at the 

 temperature of the warm-blooded animal it becomes suscepti- 

 ble to anthrax. Normal fowls are insusceptible, but Pasteur 

 showed that by lowering their temperature they become 

 susceptible. 



Fig. 105. — Impression Specimen of the Edge of a vulng Colony of 

 Hacilll-s Anthracis on Gelatine. Threads of Bacilli made up of 

 CYLINDRICAL Bacilli. 



I\Iagnified about 700. 



Besides general infection of human beings by spores of 

 anthrax (wcolsorters, hidesorters, and ragsorters) they are 

 able to contract severe local carbuncle by inoculation 

 (through a cutaneous abrasion or wound) with anthrax 

 blood of an animal (sheep, cattle, or horses). 



Rodents inoculated with the bacillus of the blood or 



