LIST OF PLATES 



I. A SHORTHORN COW SUFFERING FROM JOHNE'S DISEASE Frontispiece 



FACING PAGE 



II. THE LOWER PART OF THE ILEUM FROM A COW AFFECTED 



WITH JOHNE's disease - - - - - 48 



III. SECTION OF ILEUM ( X 250 DIAMETERS) - - * 5^ 



IV. SECTION OF ILEUM (x I,000 DIAMETERS) - - " 5^ 



V. FILM OF JOHNE'S BACILLUS ( X I,000 DIAMETERS) - - 62 



VI. CULTURES OF JOHNE's BACILLUS ON MEDIA CONTAINING 



EXTRACTS OF B. PHLEI - - - - - 82 



VII. CULTURES OF JOHNE'S BACILLUS, THE HUMAN TUBERCLE 



BACILLUS, AND THE AVIAN TUBERCLE BACILLUS - I04 



VIII. CULTURE OF ACCLIMATIZED JOHNE'S BACILLUS GROWING 



ON GLYCERINE-BEEF BROTH _ . - - 106 



IX. CULTURES OF JOHNE's BACILLUS ISOLATED FROM AN EX- 

 PERIMENTAL CALF AND TWO EXPERIMENTAL GOATS - I50 



XI 



