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- 
