PLATE VII, 



Fig. I. 



Fig. 2. 



Fig. ^, 



Photo by F. Holmes, Bristol. 

 CULTURES OF JOHNE'S BACILLUS. 



Fig. I.— Streak culture of Johne's bacillus on an egg medium made up 



with sheep's brain broth containing peptone and glycerine, and 



containing i per cent, of dead B. phki. 

 Yic, 2.— Streak culture of the human tubercle bacillus on Dorset's egg 



medium. 

 Fig. 3.— Streak culture of the avian tubercle bacillus on Dorset's egg 



medium. 



[Tofacc pa$c 104. 



