CONTAGIOUS DISEASES OF DOMESTICATED ANIMALS. 41 



quence of dry gaugrene, lialf way between the fetlock aud hock joiuts, 

 with the skiu of tlie foot still in perfect condition, though dead. In 

 otbeis the separation occurred at the fetlock, aud in niauj' others at the 

 joints below, but not as a consequence of the burrowing of pus. In- 

 deed, very little pus was to be. seen in any of the feet. It is not rare to 

 see the horn of one or both toes lost in foot-and-mouth disease, but it 

 would be remarkable for the whole toe, inchiding the bone, to slough 

 oft", as occurred so frequently here. I did not see a case where the hoof 

 was lost without a loss of the bone at the same time. The complete 

 death of the foot to the fetlock, or even higher, as occurred in all the 

 worst cases in the West, is altogether unheard of in foot-and-mouth dis- 

 ease. While there was redness, heat, and swelling above the line of 

 separation, I saw no appearance of blisters between the toes or around 

 the coronet. A large proportion of the affected animals were simplj^ 

 lame, and had neither blisters nor sores about the feet. Finally, the 

 disease was generally confined to the hind feet, or, if it attacked a 

 forefoot, it was only after both hind ones were affected. Foot-and- 

 mouth disease has no such decided preference for the posterior extrem- 

 ities. 



The eruption on the udder. — In only one case that I have heard of in 

 the West was there any appearance of an eruption on the udder of the 

 affected cow. This was a cow belonging to Mr. Keith, the young calf of 

 which died, as was supposed from the effects of the disease contracted 

 from its mother. I am unable to account for the sores which evidently 

 existed on the udder of this cow, not having seen her until they were 

 nearly healed. There is also considerable doubt as to the cause of the 

 calf's death. Certain it is that an eruption of blisters ou the udder is 

 an extremely common occurrence in foot-aud mouth disease (Fig. 3, 

 Plate X). In the West, however, a considerable number of cows were 

 affected, and but one had any symptoms of this kind. 



Iveviewing these symptoms, we can see that tlie disease which I in- 

 vestigated had few if any characters in common with foot-and-mouth 

 disease. Among the whole number there was not a single animal which 

 presented the typical characters of this plague. There did not appear 

 to be a single animal which presented even the typical mouth symptoms, 

 or the typical feet symptoms of that disease. The history, the charac- 

 ters, the symptoms, everything connected with the disease, led us to 

 conclude, therefore, that it could not be the contagious foot-and-mouth 

 disease. 



CHARACTERS WHICH DISTINGUISH THIS DISEASE EROM FOX'L-IN-THE.- 



FOOT. 



The disease known as foul -in- the foot, and often called foot-rot, has 

 its origin in the skin of the interdigital space. It begins as a superfi- 

 cial inflammation, which is followed by sloughing, ulceration, supi)ura- 

 tion, the burrowing of pus, and the formation of sinuses. By this pro- 



