DISEASES OF THE RESPIRATORY TRACT ' 49 



lighter in color than normal (emphysema). Sup- 

 purative centers may also be observed. 



Treatment. — The preventive treatment in pneu- 

 monia must not be overlooked. Briefly, it consists 

 in avoiding such conditions as may predispose the 

 animal to the disease, or act in any way as an ex- 

 citing cause. 



Careful nursing is a very important part of the 

 treatment. The hog should be given a comfort- 

 able, well-ventilated pen, and kept as quiet as 

 possible. To keep the bowels from becoming con- 

 stipated, one or two ounces of castor-oil should be 

 given daily, if necessary, and a light, sloppy diet 

 fed. ■ In severe cold weather, the animal must be 

 kept from chilling and taking more cold by cover- 

 ing it with a blanket or using artificial heat. As 

 one attack predisposes the hog to a second, it 

 should be protected from severe cold, or the other ex- 

 treme, heat, for a few weeks after making a com- 

 plete recovery. 



As a counter-irritant to the sides of the chest the 

 following liniment can be used: oil of turpentine 

 (ten parts) and croton-oil (one part). If the heart 

 action is weak, from five to ten drops of tincture 

 of digitalis should be given every few hours. Dur- 

 ing the convalescent period alcoholic stimulants 

 can be used if necessary. 



INFLAMMATION OF THE PLEURA— PLEURISY 



Pleurisy is an inflammation of the serous mem- 

 brane lining the chest cavity and covering the 



