PRIZE ESSAY: — PLEURO-PNEUMON IA AMONG CATTLE. 413 
heifers at St. Ives’ market: all coughed, and four died of the dis- 
ease shortly afterwards. 
Case 7. — In the same month and year, Mr. I. bought twenty 
cows at a fair, eight of which were attacked with the disease soon 
after, and died. 
Case 8. — Mr. S. lost three cows out of ten, bought at the same 
place, and about the same period, as the former. 
Case 9. — Mr. P. bought, in the beginning of November 1846, 
six heifers at a market close by. Two were immediately observed 
to be affected with the epizootic pleura-pneumonia, and both died 
within a fortnight after being purchased. 
Case 10 — Mr. D. bought, in November 1847, twelve steers at 
Bury market : all husked at the time. One died on December 2d 
of the disorder ; and several of the others, looking thin and weak, 
were sent back again on the 2lst to the same place to be sold : they 
were afterwards traced to the person who had bought them, and 
three more were ascertained to have died. 
Case 11. — In March 1843, Mr. S. requested my attendance 
upon a calf six months old, that was labouring under the disease, he 
having previously lost twenty-three by the epizootic pleuro-pneu- 
monia. The disease on this farm originated in some cattle pur- 
chased at Peterborough fair, and spread so rapidly that this gen- 
tleman was obliged to sell all the remainder of his stock, fearing he 
should lose a great many more. The average quantity kept was 
from eighty to an hundred. 
Case 12. — Mr. W., dairyman of this town, Cambridge, who 
keeps on an average twelve cows, lost two during the spring of 
1845, and six more during the latter end of the same year and 
commencement of the following. 
Case 13. — Mr. A., a dairyman of the same place, kept up a 
dairy of ten cows during the period between June and December 
of 1846. Four died ; and several others, which were afterwards 
attacked with the disease, were disposed of, and fresh ones bought 
in, to keep up his usual number. This person has generally been 
in the habit of supplying any deficiency in his usual number from 
dealers. 
Case 14. — Mr. M., between November 13, 1846, and February 
15, 1847, had three steers and two cows attacked with pleuro- 
pneumonia, out of a stock of twelve steers and six cows. One of 
the steers and both cows died. The twelve steers had been pur- 
chased at a market some short time before, and were turned into 
the same yard with the six cows. 
Case 15. — Mr. S., a farmer, in October 1847, bought two cows, 
one of a cattle-dealer close by, and the others at St. Ives’ market. 
Shortly after this he allowed a friend to turn two buds (recently 
bought out of a drove) into the same pasture with them : the buds 
