358 
Pleuro- Pneumonia amonf/st Cattle. 
but in an earlier stage, they were immediately bled and physicked, and 
finally recovered. 
Case 26. — In the autumn of 1846, Mr. S. purchased twenty stores 
at a distant fair, all of which couiihed ; one died of pleuro-pneumonia ; 
the others were bled and physicked, and recovered. 
Case 27. — Mr. C, in the early part of November, 1846, purchased 
at St. Ives' market twenty steers ; two were soon after attacked with 
pleuro-pneumonia, and died ; after this several others were affected with 
the disease, and upon being bled and physicked, recovered. 
Case 28. — Mr. S., a dairyman of Cambridge, who keeps thirty 
cows, lost during 1847, and the previous two years, twenty-seven cows 
and a bull in consequence of being attacked with the disease, since 
which time all his cows have been setoned, and no deaths have 
occurred. 
Case 29. — Mr. J. purchased in the month of November, 1846, 
twenty Scotch beasts at Stamford fair. Soon afier their arrival at 
home they were observed to cough, and were turned into a yard with 
five cows. Between this time and the middle of December of the same 
year seven of the young stock died ; during which period the five cows 
became affected ; three died ; all the remainder, both cows and young 
stock, recovered after being bled, physicked, and setoned. 
Case 30. — Mr. H., of Cambridge, on September 18, 1847, bought 
at the market in the same place, two buds out of a drove, which he 
turned into a paddock. On the following day both were observed 
to cough: one lived till the 30th, when it died; the other recovered 
under treatment. 
Case^\. — Mr. C, of the same place, had four cows out of eight 
attacked with the same disease, between April 13 and July 28, 1847. 
Three were disposed of, and the other recovered under treatment. 
Case 32. — Mr. R., of Cambridge, had five cows in July, 1846, when 
three became attacked with pleuro-pneumonia ; two died, and the other 
recovered under treatment, but slipped calf shortly after, as did several 
others in the preceding cases. 
Case 33. — Mr. F., of Cambridge, purchased at the latter end of 
October, 1847, four steers at St. Ives' market, which were noticed by 
the steward to husk from their first appearance on the premises ; and 
on November 19, observing that one was ailing more than the rest, 
was treated for a few days without effect, and then sold. Between 
this period and January 3, 1848, two more were attacked in the same 
manner ; one recovered, the other was disposed of. 
Mode of Infection. 
Before stating" my opinion on the " Mode of Infection," I shall 
take the liberty of bringing forward a few general considerations 
on the circumstances which appear to exercise an influence on 
the original production of a disorder, which, infectious though it 
