86 ON THE EPIZOOTIC DISEASES OF CATTLE &C. 
ft 
as on many others at a greater distance, while it totally passed 
several intervening ones. 
It first made its appearance in a lot of thirteen two-year-old 
steers, that were brought from a pasture, twelve miles distant, 
to his farm, on the 20th of October, 1840, and put into a grass 
field, where turnips were laid down for them. On the morning 
of the 22d, two of them were brought home unwell, and during 
that day the other eleven were all affected with the disease. It 
afterwards extended to more of his cattle, all his pigs, and part 
his sheep. 
The weather at the time the disease began was open, with 
occasional slight showers of rain, but no frost until a long time 
afterwards. When the frost set in, it was thought that it would 
have stopped the farther progress of the disease, but the sheep 
took ill after the frost commenced. 
The thirteen steers that were first attacked with the disorder 
had no chance of having had communication with other diseased 
animals, but they travelled along a road, on their way home, on 
which it was afterwards found that two or three lots of diseased 
cattle had passed three days before ; and as they were halted for 
half an hour at a part of the road where there is grass by the 
road-side, it is conjectured that some of the diseased cattle may 
have rested, and eaten grass at that place, and on which his 
cattle afterwards browsed. What rendered this almost certain 
was, that they were in perfect health on the morning of the 20th 
of October, when they were brought from their pasture : and 
that the field was free from infection is equally certain, as nine 
cattle and eight scores of sheep were sent to the pasture on the 
same day on which the thirteen steers left it. These nine cattle 
remained in it until the 9th of December, and the eight scores 
of sheep until the 16th of January, all of which continued in 
perfect health, never having been permitted to mix with or come 
near those that were diseased. 
As to the liability of attack, there did not seem much differ- 
ence between young and old, with the exception of calves get- 
ting milk with impunity from diseased cows. The younger ani- 
mals, however, were less severely attacked than the older ones, 
and got sooner well. 
The earliest symptoms of disease were, usually, the animal 
being dull, forsaking its food, and being unwilling to move — a 
saliva issuing from the mouth, and a stiffness being evident in 
the legs. The thirteen steers were all seized on the second day 
after the supposed infection. Seventeen other cattle got among 
them during the night previous to their having been observed to be 
