EFFECT OF. INOCULATION. 417 



Cattle infected with this disease suffer a long time before 

 it is observable ; and when first noticed, they are usually- 

 sold to the butcher, in order to be killed for food. 



" There is, however, much benefit to be derived from 

 inoculating the healthy animals. This inoculation is done 

 near the end of the tail. The hair is clipped off, the 

 skin cleaned, and two incisions made with a lancet, into 

 which the virus is introduced. The \irus must be ob- 

 tained from the lungs of a cow suffering with the disease, 

 and killed for the purpose, and not from an animal that 

 has died in the natural way from the effects of the dis- 

 ease. The manner of obtaining it is to cut off a portion 

 of the lung between the healthy and the infected parts, 

 the part marbled like water, and the blood is wrung out 

 into a vessel and allowed to stand one day, when the 

 bloody part will sink to the bottom, and a lemon-colored 

 liquid will remain upon the surface. This, if free from 

 scent, is fit for use, and may be preserved in a vial. In 

 cold weather it will keep eight or ten days before becom- 

 ing too corrupt for use, while in warm weather it will hold 

 good only one or two days. 



" The drops introduced into each incision will produce, 

 in a week or fortnight, and in some cases a longer time, 

 a pock quite similar to that caused by the inoculation of 

 persons with the cow pox. When no pock appears, it is 

 presumed that the animal is not susceptible to the disease. 

 When the tail of the animal becomes much swollen, an 

 incision is made, in order that the infectious matter may 

 run out, and the wound is from time to time cleansed with 

 water. 



" The benefits resulting from this discovery are such 

 that where the peasants formerly lost from fifty to sixty 

 per cent, of their cattle, they now lose only one per cent. 



" Inoculation is also practised on animals afflicted with 

 the disease, and sometimes with favorable results. Some 

 have resorted to bleeding, some have purged with English 

 salt and water, others have fumigated and purified their 

 stables, but no sufficient remedy has been found." 



There is, it is proper to say, a difference of opinion 

 among scientific practitioners in regard to the efficacy of 



