DISEASES OF THE RESPIRATORY ORGANS. 137 



Many methods of treatment have been suggested for 

 these, which are the most hopeless cases. Bhsters or the 

 actual cautery have, however, succeeded in arresting the 

 atrophic change when applied in the early stages to the 

 skin of the laryngeal region. 



Potassium chlorate is recommended as worthy of 

 trial for arresting the fatty degeneration. In very bad 

 cases the sound may be lessened by pads attached to the 

 bridle and fitted carefully over the nostrils, so as to 

 regulate the amount of air entering the larynx. If this 

 method is ineffectual, tracheotomy may be performed, 

 and the tube kept in during the rest of the life of the 

 animal. 



Probably the galvanic current is of great benefit, and is 

 well worthy of careful trial. 



Removal of the left arytenoid cartilage has been recom- 

 mended by Herr Giinther, but the cases thus operated on 

 in this country are not sufficiently successful to warrant 

 the general adoption of this method. Bad roarers can be 

 used for slow work ; they thrive badly as a rule, and often 

 fall victims to slight disorders. /f^Xl'^^)/^ 



ACUTE CATARRH. 



Synonyms. — Catarrh; coryza; common cold. 



Definition. — By the term ' catarrh' we signify a condition 

 characterized by inflammation of the mucous membrane of 

 the nasal chambers, and of its continuation along the upper 

 portions of the larynx and trachea. In this condition there 

 is a discharge from the nose, and occasionally cough and 

 sore throat. 



Febrile symptoms are also often present. 



Etiology. — Sudden variation in the temperature; ex- 



