ABSCESS OF LUNG. 581 



seen abscesses in the lungs of horses and cattle. The lung 

 around the seat of the suppuration usually becomes clear 

 and healthy. A bronchial tube may communicate with the 

 cavity of an abscess that has burst, and the fetid contents of 

 which are thrown up in coughing. There is a very charac- 

 teristic cavernous rale over the seat of the abscess. The 

 animal thus affected does not thrive, lingers on with a small, 

 frequent pulse, capricious appetite, fetid breath, and may die 

 from hectic. 



Treatment Fresh air, moderate exercise, mineral and 

 vegetable tonics, stimulants, linseed cake, whether to horse 

 or ox, cod-liver oil to smaller animals, and, in severe cases, 

 the application of one or two active blisters to the sides. 



PLEUEISY INFLAMMATION OF THE PLEUEA. 



This very common disease is, in the horse, often mistaken 

 for influenza. It is very prevalent in exposed countries, and 

 wherever rheumatic disorders are frequently observed. Its 

 causes are very similar to those mentioned for other acute 

 affections of the respiratory organs, but it is especially 

 noticed, at different periods, to prevail in an enzootic or 

 epizootic form, attacking animals of all ages and under all 

 circumstances. Pleurisy is noticed when injuries are inflicted 

 on the chest. Mr John Field says he has seen it, after clip- 

 ping, as the result of exposure to cold. Duvieusart saw 300 

 cases of pleurisy in a flock of sheep, shorn in February, 30 

 of which died. It occurs chiefly in horses of spare but vigor- 

 ous habit, and may affect one or both sides of the chest. 

 It is most frequently seen implicating both pleural sacs in 

 the horse. 



Symptoms. Feverish symptoms usher in the disorder, 

 but they are at first slight. There is a firm, wiry pulse, from 

 45 to 60 per minute. Respiration abdominal; inspiration 



