Explanation of Plate 48. 



MYCOBACTERIUM TUBERCULOSIS (Koch). Lehm. and 

 Neum. 



(Tubercle bacillus.) 



I. Glycerin-agar streak culture, fourteen days at 37. 

 II. Glycerin-agar streak culture, forty days at 37. 

 III. Potato culture, forty days at 37. 

 IV. Colonies of tubercle bacilli in a blood-serum cul- 

 ture. X700. ( Copied from Koch : "Aetiol. d. 

 Tubercul. Mittheil. d. kais. Gesundheitsamt," 

 Vol. II., PI. IX., 44.) 



V. Culture on blood serum from a piece of freshly 



extirpated scrofulous gland. (Copied as above.) 



VI. Giant cell with radiating arrangement of the 



bacilli. From the cheesy bronchial gland of a 



case of miliary tuberculosis. (Copied as above, 



PL II. , 9.) 



VII. Microscopical preparation. Pure culture. Stained 



by Ziehl's method, x 1, 000. 

 VIII. Branching of tubercle bacilli. (Copied from Hayo 



Brims: C. B., XVII., No. 23.) 

 IX. Microscopical preparation. Sputum. Ziehl's 



stain, x 1,000. 

 X. Individual bacteria. Highly magnified. 



48 



