FIG. 59. B. Diphtheria-. 

 Human blood serum a^ar 

 culture. 



Fm. 61. B. Typhi Abdominalis. Gela- 

 tine stab culture. 



Fio. 60. Avian Diphtheria. Chickens in the last stages of the disease. 



\T. Jtowhill, F.R,C.V.S., Photo., Edinburgh, 1898, 



