118 PLETTBISY, PNEUMONIA, <feo. 



breaks out upon it here and there : the mouth is cold ; 

 the tongue is coated ; the teeth are ground every now 

 and then, and twitches are occasionally seen. The 

 eyes become more and more heavy, glassy, and dim ; 

 the strength becomes less and less ; the horse leans 

 against the stall or manger, or wanders around ; he 

 staggers and falls ; tries to rise, but cannot ; groans, 

 struggles, and dies. 



As an improvement takes place, the horse appears 

 more natural, warmth returns to his extremities, his 

 breathing is more free, pulse softer, fuller, and less 

 frequent, cough easier, and he lies down quietly, and 

 without uneasiness. These good symptons rarely 

 or never deceive. 



Placing the ear against the ribs, upon various parts 

 of the chest, we may learn with some practice to dis- 

 tinguish the progress of inflammation. In the healthy 

 lung, the air passes in with a slight, rustling murmer, 

 quite characteristic, and which, once heard, will al- 

 ways be recognized. As the lung becomes inflamed, 

 "crepitation" takes place, and we hear a sound) 

 slightly cracking, like that made by salt thrown into 

 the fire, or by rubbing the hair between the fingers 

 close to the ear. As, by degrees, the lung becomes 

 more intensely inflamed, it is more and more imper- 

 vious to the air, until it becomes " hepatized " or 

 solid, and gives no sound, and no resonance when 

 percussed, or struck upon. These changes are in- 

 teresting, and afford to the practiced ear clear indi- 

 cations of the state and progress of the disease. 



