SYMPTOMATIC ANTHRAX 205 



Cattle and sheep are almost the only animals subject to 

 this disease; guinea-pigs are susceptible, and die within 

 thirty-six hours after inoculation. It is stated that 

 cultures on solid media preserve their virulence better than 

 those in broth. The production of immunity in cattle has 

 been successfully attempted by injecting them with attenu- 

 ated cultures. 



