Contagious Diseases and Their Suppression. 267 



intervals for three doses is also useful. The removal of 

 the calf at birth and its thorough disinfection will tend 

 to prevent this fatal disease. The following powder is 

 highly thought of by some veterinarians: 



Powdered rhubarb root I 1 ,- drams. 



Powdered opium \ dram. 



Powdered carbonate of magnesia ] dram. 



Give as one dose in a couple of ounces of brandy and 

 white of egg. 



Cow pox is of interest to the general public owing to 

 the adoption of .Tenner's vaccination of human beings 

 with the lymph of cow pox as a protection against small 

 pox. The stockman is also interested from the fact of 

 its contagious nature, often rendering cows extremely 

 hard to milk, due to the soreness of the teats, and its caus- 

 ing a diminished milk supply. The eruption is usually 

 confined to the udder and teats, the latter show pink 

 pimples, which later become reddish vesicles; as many 

 as twenty or thirty may be present, varying in size 

 from a lentil to a pea. The vesicles vary in color ac- 

 cording to the skin, they have a depression in their 

 centers, are circularjin shape on the udder, elliptical on 

 the teats; they mature about the tenth day and then a 

 discharge is given off; the vesicles dry up into a dark 

 brown crust, which, in four days, falls off. The disease 

 takes about three weeks to run its course in an animal; 

 it is often carried from one cow to another by the milk- 

 ers, some of whom at times become infected. The dis- 

 ease usually follows a favorable course, hence treatment 

 is rarely necessary; some mild salve, carbolic or borated 

 vaseline will be all that is necessary. The disease will, 



