CHOREA. 
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acres each, all of which are set in grass. They were nearly all 
set in bine grass, but some in timothy, and all are unusually free 
from all kinds of weeds and brush. A search for any weed 
which might be poisonous revealed nothing. The pastures are 
well drained, well watered, and in every respect almost ideal. 
The yearling and two-year-old cattle seemed more subject to 
these attacks than mature cows or young calves, and do not re¬ 
cover as promptly. 
All those showing the symptoms have improved rapidly 
when put on dry feed, and in from two to four weeks in every 
case recovery has apparently been complete. However, those 
which have once been affected and have been cured by feeding 
on dry feed show a great tendency, on being returned to the 
blue grass pastures, to become affected again. 
From Mr. Arnold I obtained the following interesting his¬ 
tory of the disease : 
The disease was noticed in about five or six head in 1896, in 
the fall of the year. A few head became affected each subse¬ 
quent fall. In the fall of 1898 it was noticed during the dry 
weather. It never occurred in the winter or spring of the year 
until 1901, when in March about twelve head were affected. 
During Christmas week, 1900, about twenty-five head were 
showing the symptoms, this being the greatest number that was 
noticed to be affected at any one time. It commonly occurred 
in October and November. In March, 1901, in a field seeded 
to timothy and clover, but one corner of which, containing 
about five acres, was not mowed, a few calves in a herd became 
affected. On being removed to another pasture all recovered. 
Cattle in the adjoining pasture, which was set in timothy and 
clover and had all been mowed, were not noticed to be affected. 
The disease has not appeared on pastures that have been 
mowed. 
One pasture of forty acres was not used in the summer of 
1900. It was kept for winter pasture. In November, Mr. Ar¬ 
nold turned into this pasture about sixty steers, and five became 
affected inside of a week, when they were all turned out. The 
