88 ESSENTIALS OF BACTERIOLOGY. 



Habitat. The anthrax disease seems confined to certain dis- 

 tricts in Siberia, Bavaria, and Auvergne, and mainly during the 

 summer months. 



The bacillus has never been found tree in nature. 



Bacillus Tuberculosis. (Koch.) 



This very important bacillus was first described, demonstrated, 

 and cultivated by Koch, who made his investigations public on 



FIG. 4G. 



V 



O 



( > 



s 



s 



^ 



X 



Tubercle bacilli in sputum, carbol-fuchsin, and methylin blue. Zeiss 1:12 oil 

 immersion. 



the 24th of March, before the Physiological Society of Berlin, 

 in the year 1882. 



Origin. In various tubercular products of man and other 

 animals. 



Form. Very slender rods, nearly straight, about one-quarter 



