384 Veterinary Medicine. 



there is exposed a humid, pink, granular surface not projecting^, 

 beyond the surrounding skin. This surface is hollowed out by a. 

 very deep central cavity, a sort of umbilicus, in which is inserted,, 

 like a nail, a projection from the deep surface of the crust." 



I would add that after recovery the hair in the seats of the- 

 nodules has a lighter color and, on the shanks and higher, re- 

 mains dappled .for the season. 



No treatment is demanded. The application of a solution of 

 sodium bisulphite once or twice a day, or continuously on a 

 bandage, will greatly modify the intensity of the inflammation, 

 and ward off complex infections. If the skin is left tender or 

 with a disposition to crack, treat it as advised under chapped heels, 



COWPOX. VARIOLA VACCIN.^. 



This is manifestly .the same disease, and due to the same mi- 

 crobe as horse pox. The disease of the one genus is easily trans- 

 mitted to the other and the lesions and symptoms are the same, 

 as if the virus were derived from an animal of the same species. 

 Differences in the local manifestations appear to be due rather- 

 to the varying conditions of the skin and hair follicles, than ta 

 any material distinction in the virus. 



Causes. Aside from the germ the conditions which favor in- 

 fection are : the milking of susceptible cows with imperfectly 

 washed hands, after dressing legs, the seat of horse pox eruption ; 

 the milking of healthy cows after those affected with cowpox ^ 

 and the milking with hands contaminated with the exudate in- 

 cases of vaccination of man. That susceptible cows may also 

 be inoculated successfully from smallpox patients, under given 

 conditions appears to be true, but in Western Europe and 

 America this is very uncommon, and would be much more so if 

 vaccination were universally carried out. Among those who* 

 claim the identity of small pox and cow pox may be named Ceely^ 

 Reiter, Babcock, Thiele, Voigt and Klein. 



Ceely alleges the infection of five cows and one heifer, in 1839,. 

 in England, from chewing the flock of a bed on which a small 

 pox patient had died. In 12 or 14 days they had tender con- 

 gested udders, with hard pimples imbedded in the skin, followed" 

 by blisters, and brownish scabs. The milk diminished, saliva 

 drivelled from the mouth, the cheeks were inflated and retracted,,. 



