Contagious and Epizootic Diseases. 47 



seat of a deep violet congestion and extensive ulceration, 

 pustules appear on the perineum, tail and between the 

 thighs, the Hps of the vulva are parted, exposing the irreg- 

 ular, nodular, puckered, ulcerated and lardaceous-looking 

 mucous membrane, abortion ensues, with emaciation, lame- 

 ness, 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 of extravasated 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 three years death puts an end to the 

 suffering. 



It is needless to speak of treatment. Should this dis- 

 ease ever reach America it ought to be stamped out at 

 once as its insidious nature would enable it to spread to 

 the great destruction of stock. 



TUBERCULOSIS. CONSUMPTION. PDJING. 



This is a hereditary constitutional affection, character- 

 ized 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-hke tissue of the different organs, and 

 may be seen in aU stages from the simple redness and con- 

 gestion in which the deposit is only commencing, through 

 the solid grayish tubercle to the soft yellowish, cheese-hke 

 mass resulting from the softening of the latter. There are 

 also the open cavities (vomica) resulting from their rup- 

 ture 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 tu^^erculosis), or in the chest of cattle one 



