170 CONTAGIOUS DISEASES. 



carefully cut, a quantity of straw-coloured lymph, only found 



Fig. 5. — (a) Pleural surface presenting a smooth opaque appearance. 

 (6) Subpleural exudation, (c) Red consolidation, (d) Thickened inter- 

 lobular tissue, (e, e) Haemorrhagic spots, due to extravasation into 

 alveoli. 



in recently invaded lung territory, flows from the cut surface. 

 This may be collected and used for inoculation purposes. At a 



Fig. 6. — {a, a) Exudation in air vesicles, composed of a fibrinous net- 

 work, with leucocytes lying in it. (b, I) The same caseating. (e) Air 

 vesicle filled with leucocytes only. (480 diam.) 



In the centre is seen a blood-vessel fiUed with a fibrinous plug, and 

 around it numerous leucocytes in the substance of the wall of air 

 vesicle. 



later stage this is more gelatinous in consistence. The pleural 



