342 Veterinary ■ Medicine. 



solution of boric acid. In case of simple incision this is done at 

 the same point, with corresponding precautions, and the cavity 

 is to be disinfected in the same way. Then the opening may be 

 dusted with iodoform or aristol, and covered with sublimate 

 gauze or cotton sustained by a bandage. In case of necessity an 

 aseptic drainage tube may be used. 



The greatest attention must be given to secure generous 

 nourishment, pure air and genial temperature. Internally 

 quinia and calcium sulphide may be given. 



PURULENT PLEURISY (EMPYEMA) IN CATTLE. 



This may occur in cattle from the same kinds of injuries as 

 cause it in solipeds. Broken ribs followed by necrosis or caries, 

 penetrating wounds of the thoracic walls from horns, tusks, etc. , 

 bruises and abscesses of the chest walls, sternal or costal, per- 

 forations of the gullet by sharp pointed bodies or by whips or 

 other unsuitable bodies in ill-directed attempts to relieve choking, 

 come under this head. A special cause is found in the migra- 

 tion of sharp pointed bodies from the reticulum into the chest 

 and usually toward the heart. It may be the result of rupture 

 into the pleura of abscesses in the lungs, bronchial glands or 

 elsewhere in the chest, and still more commonly from softened 

 and caseated tubercle, pulmonary or pleural. Advanced lung 

 plague with suppurating sac enclosing sequestrum, and pyaemia 

 from distant purulent or septic centres of infection may become 

 causes. Septic metritis after calving has been specially incrimi- 

 nated. 



Lesions. As in horses these are as varied as the primary 

 cause of the trouble. The effused liquid is opaque, grumous, 

 with many cell organisms and much granular matter, usually 

 very foetid, and of a color varying from a dirty yellow, or grayish 

 white to a deep, dark red or even black. The serous membrane 

 is congested or it may be pale. In cases due to tuberculosis the 

 tubercles may be present in all conditions from the recent firm 

 red nodule, to the caseated mass and vomica. The liquid in 

 this case contains the caseated debris and shreds of decomposing 

 membrane, and in common with the tissues the bacillus tuber- 

 culosis. 



