CONTAGIOUS AND EPIZOOTIC DISEASES, 4? 



irregular, nodular, puckered, ulcerated, and lardaceous-looking 

 mucous membrane, abortion ensues, with emaciation, lameness, 

 paralysis, and death, after a wretched existence of five months 

 to two years. In horses swelling of the sheath may be the 

 only symptom for a year, then there may follow dark spots ol 

 cxtravasated blood, or swellings of the penis, the testicles may 

 swell, a dropsical engorgement extends forward beneath the 

 abdomen and chest, the lymphatic glands in different parts of 

 the body may swell, pustules and ulcers appear on the skin, 

 the eyes and nose run, a weakness and vacillating movement of 

 the hind limbs gradually increases to paralysis, and in a period 

 varying from three months to tliree years death puts an end to 

 the suffering. 



TUBERCULOSIS. CONSUMPTION. PINING. 



This is a hereditary constitutional affection, characterized by 

 a specific deposit of cells, large and small, in a special network, 

 but without blood-vessels. It is situated by preference in the 

 groups of lymphatic glands, or in the microscopic gland-like 

 tissue of the different organs, and may be seen in all stages 

 from the simple redness and congestion in which the deposit is 

 only commencing, through the solid grayish tubercle to the soft 

 yellowish, cheese-like mass resulting from the softening of the 

 latter. There are also the open cavities {vomica) resulting 

 from their rupture and the discharge of the tuberculous matter, 

 and chalky masses from the deposit of earthy salts within them. 

 They may be no larger individually than a millet-seed (miliary 

 tuberculosis), or in the chest of cattle one may measure a foot 

 long and five or six inches in thickness. They are most 

 common in cattle, especially heavy milkers, with long legs, 

 narrow chest, attenuated neck and ears, and horns set near 

 together. Sheep and swine with a con-esponding conformation 

 are next in order of liability, while horses, dogs, and fowls are 

 comparatively exempt. Oft-repeated experiment has shown 



