XIII] MICROBES OF MALIGNANT ANTHRAX 289 



Pasteur has shown by a large number of experimenls 

 carried out in France and elsewhere that, by inoculation of 

 such attenuated cultures, protective inoculation can be 

 effected on sheep and cattle. He used two kinds of culture. 



-Network of Capillaries filled with Bacillus Anthracis ; 

 THE Omentum of a Rabbit dead of Anthrax. 



1. Extravasation of the bacilli. 



2. Capillaries filled with the bacilli. 



Magnifying power 350. 



for protective inoculation : {a) premiere vaccine : this is a 

 culture of anthrax bacillus in chicken broth kept at 42 's" C. 

 for fourteen days ; when inoculated into sheep or cattle it 

 produces only a slight local tumour ; after about twelve days 



U 



