DISEASES OF THE RESPIRATORY SYSTEM. 131 



A gargle of silver nitrate may be thrown back into the fauces 

 by means of a syringe, or the tincture of capsicum may be so used; 

 these irritate during first stages. 



Carbolic acid, alum, potassium chlorate, etc., may also be used. 

 A two per cent, solution of cocaine may be used, especially in the 

 latter stages, where a hacking cough remains. 



Steaming with hot water medicated with a non-irritating dis- 

 infectant vapor is very useful, in connection with a gargle, electuary, 

 or counter-irritation. 



Where the fever is high and the membrane is dry, potassium 

 nitrate with small doses of tartar emetic can be given in the drink- 

 ing-water two, three, or four times a day. 



Bland food should be given, and food that is easily digested, 

 especially when the fever is high. Bran mashes, or a layer of oats 

 and bran with a pinch of salt, and hot water, often tempts these 

 animals to try to eat. 



Be sure that the manger is perfectly clean; have it washed 

 out thoroughly, as it may contain food wet with the discharge from 

 the throat. It is well to feed these animals out of a clean pail and 

 tempt them to eat. 



CHRONIC LARYNGITIS. 



What is the synonym ? 



Chronic sore throat. 



Define chronic laryngitis. 



It is a chronic inflammation of the lining membrane of the 

 larynx, with an involvement of the submucous tissue, characterized 

 by a persistent cough. 



What is the pathology? 



The mucous membrane is more or less coated with mucus or 

 pus. The membrane is darker in color, often a grayish-red or a 

 bluish tint, due to the ecchymosis; the membrane may be softer 

 or firmer than normal, and the mucous glands are more or less 

 large and prominent, with a thickening of the submucous tissue. 

 If the membrane of the trachea is involved, it becomes reddened 

 over the rings and darker or grayish in between. 



