EXTRACTS FROM FOREIGN JOURNALS. 
269 
animals are especially and about equally predisposed to it. It 
cannot be overlooked nor covered up, therefore, as can a disease 
which confines its ravages to a single genus ; but sheep, goats and 
swine coming within the range of the infection contract and 
manifest the disease as readily and in as marked a way as do 
cattle. 
Third —The period of latency or incubation is remarkably 
short, the eruptions of the malady often taking place in thirty- 
six hours and rarely being delayed, even in cold weather, beyond 
six days after exposure to infection. There is, therefore, no op¬ 
portunity for concealment nor for the disposal of infected but 
still apparently sound animals, while a journey of four or six days 
from the west, with the attendant privations and febrile excite¬ 
ment, would infallibly determine the full eruption of the disease 
before the stock arrived at the eastern seaboard, aud this 
although the infection had only been received after shipment on 
the cars. 
NOT TO BE HIDDEN. 
Fourth —The manifestation of the disease is not only so uni¬ 
versal in the herd affected, but so prominent and unmistakable 
that it could not possibly be overlooked. No one could ignore 
for a moment the swollen digits, the lameness and the blisters or 
ulcers between the hoofs; the heat, tenderness, swelling and 
blisters or raw sores on the udder and teats and the abundant 
frothing and slobbering at the mouth; the frequent loud smack¬ 
ing noise made with the tongue and palate and the large rounded 
blisters or red angry sores on the mucous membrane of the 
mouth. These cannot escape the attention of the owners and 
attendants, and especially when a whole herd of ten, fifty or one 
hundred are suffering simultaneously. Much less can they escape 
the instructed eye of the professional veterinarian. 
HISTORY OF THE DISEASE IN THIS COUNTRY. 
In this connection it may be well to state that the invasion of 
the foot and mouth disease that swept from Canada over 
Northern New York and New England in 1871 created something 
