PLATE 23. 



Bacillus tuberculosis. 



In sputum from a case of human phthisis. 



Stained by Ziehl-Neelsen method. 



x ]000. 



Bacillus tuberculosis. 



Giant cell. Bacilli in situ within the cell. 



Stained by Ziehl-Neelsen method. 



x 1000. 





* 



Bacillus tuberculosis. 



From edge of caseous patch in human lung. 

 x 750. 



Bacillus tuberculosis. 



Film preparation from glycerin e-glucose-agar culture 

 4 weeks at 37 C. Stained with carbol fuchsin ' 

 X 1000. 



[To face page 328. 



