308 INFLAMMATION OF THE LUNGS. 



push the treatment so far in influenza as in pneumonia ; 

 for if the two should be confounded, and the milder be 

 treated as the severer case ought to be, then it is a thousand 

 to one but disease of the chest supervenes, hydrothorax 

 sets in and brings the mistaken disorder to a termination. 

 Inflammation of the lungs has also been mistaken for colic, 

 from the horse sometimes expressing considerable uneasi- 

 ness, and often looking round to his sides ; but in colic the 

 horse evinces acute pain, by stamping with his fore feet, or 

 kicking at his belly with his hinder legs : by turns, he lies 

 down and rolls, and then suddenly rises, appearing quite 

 well for a certain space, during which he will fall to eating ; 

 while, on the contrary, in pneumonia, he never lies down, 

 but stands stupidly quiet, except now and then, when he 

 may look at his trunk, but without any of the impatient 

 indications of pain, or intervals of perfect ease : it may 

 also be added, that in inflammation of the lungs the pulse 

 announces danger from the beginning, while in colic it is 

 at the commencement of the healthy character. From 

 pleurisy it will be more difficult to distinguish pneumonia ; 

 but true pleurisy is seldom if ever marked with the op- 

 pressed pulse ; but, on the contrary, with one hard, full, 

 and less increased in frequency, at least in the early stages. 

 Further distinctions may also be drawn from the greater 

 pain manifested in pleurisy, by the twitchings in the fleshy 

 panicle which covers the muscles, and by the sharp man- 

 ner in which the breath is exhaled ; as also by the absence 

 of the inflammatory tinge of the pituitary membranes, 

 they not being a continuous portion of the affected organ, 

 as in pneumonia. 



Post-mortem appearances. — These, like the symptoms and 

 terminations, vary, being, like them, dependent on circum- 

 stances connected with the nature and duration of the 

 attack. When the disease is severe, it destroys within the 

 first three days. The cellular texture of the organ will be 

 then found choked with dark venous blood, and irregular 

 spots or patches of inflammatory colouring on the surface : 

 if protracted longer, other parts may have been involved in 

 the disease ; there will then be superadded adhesions to the 

 pleurae, with increased interstitial fluid mixed wath masses 

 of coagulable lymph ; the substance of the lungs, when cut 



