Pathology Delafie/d and Prudden, 



Plate XI. 



Pulmonary Tuberculosis (Chronic), with Large Cavities. 



The ragged communicating cavities involve a large part of the lung and are bronchiec- 

 tatic in origin. The bronchial lymph-nodes are enlarged, tuberculous, and caseous. The 

 pleura and interlobar septum are thickened by the formation of dense fibrous tissue. 



