270 BARBER AND TEAGUE. 



Plate VIII. 



Human lung in pneumonic plague; marked lobar pneumonia, showing deep 

 hyperemia of bronchi. 



Plate IX. 



Human lung in pneumonic plague, showing more well-marked areas of 

 lobular pneumonia and pleural exudate. 



Plate X. 



Human lung, pneumonic plague, showing gray hepatization and fibrinous 

 pleurisy. 



Plate XL 



Human throat, larynx, and trachea in pneumonic plague. Marked hy- 

 pereemia of the larynx and trachea; the tonsils not swollen; marked 

 hyperplasia of an incised lymphatic gland to the right of the trachea 

 and of a small more hemorrhagic gland at the base of the trachea. 



Plate XII. 



Fig. 1. Lung of dog with pneumonic plague. 



2. Liver of tarbagan {Arctomys bobac Schreb.), showing chronic 

 plague infection. 



Plate XIII. 



Microscopical section of human lung, showing particularly congestion of 

 the alveoli filled with plague bacilli. (Drawn from magnification of 

 150 diameters.) 



Plate XIV. 



Microscopical section of human lung, showing particularly alveoli filled 

 with plague bacilli. (Drawn from magnification of 780 diameters.) 



Plate XV. 



Microscopical section of human lung in advanced stage of pneumonia, 

 showing bacilli in great masses about blood vessels. (Drawn from 

 magnification of 780 diameters.) 



Plate XVI. 



Microscopical section of human lung in stage of hepatization with absence 

 of fibrin. Section stained for fibrin by Weigert's method. (Drawn 

 from magnification of 330 diameters.) 



Plate XVII. 



Microscopical section of human lung in pneumonic plague, showing char- 

 acter of alveolar exudate. (Drawn from magnification of 330 di- 

 ameters.) 



Plate XVIII. 



Microscopical section of human tonsil, pneumonic plague, showing con- 

 gestion. (Drawn from magnification of 150 diameters.) 



