BROKEN WIND. 249 



On examining the body after death, it appeared that one half of 

 the lungs for a long time past must have been perfectly useless, 

 for the purposes of respiration, being so completely hepatized 

 as to be heavier than water." 



But little can be done in the way of treatment for a thicks 

 winded horse. It is important to keep the bowels regular; and 

 by feeding with good sweet provender some relief is usually 

 afforded. 



ROARING AND WHISTLING. 



There are different stages of the same disease, arising from q 

 thickening of the windpipe, or of the membranes of the larynx, 

 rendering the passages smaller at the diseased parts. Thesq 

 diseases are generally the termination of neglected bronchitis, 

 laryngitis, and all diseases of a pulmonary or catarrhal cha» 

 racter ; ulceration of the glottis (a portion of the larynx) is also 

 a cause of roaring. 



If these diseases are caused by tight reining, the bearing rein 

 should be left off; if they arise from other causes, there is but 

 little prospect of benefiting the animal, except in cases where 

 the thickened parts are in an inflammatory condition, when 

 relief will be afforded by the application of mustard plasters or 

 fly blisters to the parts affected. 



BROKEN WIND. 



The cause of broken wind, or heaves, has never been satis- 

 factorily ascertained ; some writers attributing it to functional 

 derangement of the digestive organs, others to rupture of the 

 air-cells of the lungs, while yet a third class to a spasmodic 

 action of the diaphragm, a muscle dividing the chest from the 



