COW-POX. 



237 



rapid loss of flesh. In about three or four days, red hard 

 spots are seen, which soon appear circumscribed; the teats 

 become painful and slightly swollen. The spots attain the 

 size of a horse bean, and milking becomes generally very 

 painful to the animal. They rapidly increase in size and 

 tenderness, and become charged with a limpid fluid, and 



Fig. 204. 



are surrounded by a red base or areola. The limpid fluid 

 becomes opaque and purulent, and the distinctive feature of 

 the pustule is, that it has a depression on its summit, as seen 

 in the above woodcuts. It is technically termed "umbili- 

 cated." It is most perfect about ten days after its first 

 appearance. 



