520 MANUAL OF MODERN FARRIERY. 



the COWS, with some particles of the infectious matter adhering 

 to his fingers. When this is the case, it commonly happens 

 that a disease is communicated to the cows, and from the 

 cows to the dairy-maids, which spreads through the farm, 

 until most of the cattle and domestics feel its unpleasant 

 consequences. This disease has obtained the name of cow- 

 pox. It appears on the nipples of the cows, in the form of 

 irregular pustules. At their first appearance they are of a 

 palish blue, or rather of a colour somewhat approaching to 

 livid, and are surrounded by erysipelatous inflammation. 

 These pustules, unless a timely remedy be applied, frequently 

 degenerate into phagedenic ulcers, which prove extremely 

 troublesome. The animals become indisposed, and the se- 

 cretion of milk is much lessened." 



Frequently another kind of eruption appears on the udder 

 of the cow, which, when not carefully examined, may be 

 mistaken for the cow-pox. It manifests itself by the ap- 

 pearance of a number of white blisters on the nipples, filled 

 with a whitish serous fluid. They are distinguished from 

 the cow-pox pustules, by not having the bluish colour of 

 the latter, as well as their never eating into the fleshy parts, 

 being entirely confined to the skin, and terminating in 

 scabs. This eruption is infectious, but not so highly so as 

 the true cow-pox. 



Dr. Jenner was of opinion that this spurious eruption 

 had its origin in the transition of the cow in the spring 

 from a poor to a rich diet, at which period the udder be- 

 comes more than usually vascular from the supply of milk. 

 In the west of England dairies there is still a third kind 

 of inflammation, accompanied by pustules, which is not un- 

 common. When a cow with a naturally small udder is 

 intended for sale, she is neither milked by the hand or by 

 a calf for a day or two previously to her disposal. Conse- 



