THE GROUSE DISEASE 



confirm this in a striking manner, though they were 

 undertaken with a different object. While investi- 

 gating the action on animals of different pathogenic 

 microbes, when introduced simultaneously or sepa- 

 rately into the same animal, I tested also in this 

 direction the action of the bacillus of fowl cholera and 

 fowl enteritis. Pigeons, as we mentioned on a former 

 page, are very susceptible to fowl cholera, but quite 

 refractory to fowl enteritis. I inoculated [a) two 

 pigeons with fowl enteritis culture (broth culture 48 

 hours old), {p) two pigeons with fowl cholera culti- 

 vation (broth culture 48 hours old), and {c) two 

 pigeons with a mixture in about equal parts of the 

 same two broth cultures. 



The pigeons a remained well and alive, the two 

 pigeons b and the two pigeons c were found dead after 

 48 hours, from typical fowl cholera. The two pigeons 

 a were then after about ten days inoculated with fowl 

 cholera cultivation (broth culture 48 hours old) ; both 

 were found dead before 30 hours were over from 

 typical fowl cholera. 



One fowl and one pigeon were inoculated with a 

 broth culture of the bacillus of fowl enteritis. The 

 fowl became ill with the typical fowl enteritis, but the 

 pigeon remained, as a matter of course, unaffected. 

 The fowl, though at first very ill, nevertheless did not 

 die, but recovered gradually. After the lapse of 14 



