TREATMENT 97 



capillaries where the lung tissue falls an easy 

 prey to the subsequent pyogenesis. We have 

 found the lungs riddled with abscesses in af- 

 fected horses that have died from fistula. 



Pleurisy 



The pleura is occasionally attacked with an 

 inflammatory process arising from its conti- 

 nuity with the affected musculature sin-round- 

 ing it. The deep secondary abscesses which 

 burrow down to the bodies of the vertebra^ and 

 then descend over the costal surface are the in- 

 fluential factors in this connection. At first cir- 

 cumscribed, the inflammation soon extends over 

 a wider surface until the subject is affected with 

 a diffuse fatal sero-fibrinous pleuritis. Figure 

 11 illustrates a case affected both with poll-evil 

 and fistulee of the withers. The subject was 

 seven years and a fair type of delivery wagon 

 horse weighing eleven hundred and fifty 

 pounds. It was first attacked with poll-evil, 

 but before this was submitted for treatment 

 the withers were already tumefied with a 

 phlegmonous enlargement. The poll-evil was 

 submitted to the radical operation and 

 promptly cured after thirty days. During this 

 period of convalescence from the poll-evil oper- 

 ation, the withers pointed and discliarged a 

 copious quantity of pus on the right side ad- 



