58 MANUAL OF MODERN FARRIERY 



Causes. — This affection for the most part owes 

 its origin to previous inflammation, and more especially 

 inflammation and thickening of the mucous membrane 

 which lines the bronchial tubes. 



Remedies. — This disease does not come within 

 the scope of medical treatment : all that can be done 

 is to guard against overloading the stomach with 

 food, and not to exercise the animal to any extent 

 while his stomach is full. Abstain from subjecting 

 him to hard labour, or trotting and galloping him 

 violently. By these precautions the affection may 

 gradually subside, and in time he may become almost 

 sound. 



BROKEN WIND. 



Symptoms. — A marked distinction prevails between 

 this disease and thick wind. In the latter the inspira- 

 tions and expirations are of uniform length and dura- 

 tion ; while in broken wind, for one inspiration two 

 expirations are required, which is plainly indicated by 

 the motion of the flanks. This is caused by the 

 rupture or union of several of the air-cells, which 

 renders the cavities of the lungs more complicated, 

 and hence requires that double action to expel the air. 

 It may be easily conceived that Vv^hen the lungs are 

 expanded the air will rush in readily enough, and one 

 exertion of the muscles of respiration is sufficient to 

 expel the carbonised air ; but when these cells have 

 become united, the cavity of the lung is so irregular 

 and many-cornered, that air is with difficulty expelled 

 from them, and therefore two efforts are required to 

 effect it. 



Broken wind is generally accompanied by a hard, 

 dry, husky cough, differing completely in its character 

 from that of a common cold. 



