354 
Pleuro- Pneumonia amoin/st Cattle. 
latter. As the middle lobe of the right, and the anterior part of 
the posterior lobe of the left lung are the parts which the inllam- 
mation seems usually to affect first, it would be advisable, when 
examining the chest of an animal, to direct our attention to the 
middle part of the back in the region corresponding to the angles 
of the ribs. 
In the last case described (15.), a morbid product was found 
not only in the anterior lobe of the lung affected with the disease, 
but also in that of the healthy or rather emphysematous lung; 
this product presented all the characters of the tubercle. Now 
without saying that the constitution, which is favourable to the 
development of tubercles, may not be a predisposing cause of 
the disease in question, yet it is evident that the presence of 
tubercles in the lung, at least in their first stages, does not render 
the parts around them more liable to inflammation than other 
parts of the lung, a fact not without importance as regards the 
general history of the tubercle. 
Having concluded the principal matter that I have to com- 
municate on those parts of the history of the disease which have 
reference to its symptoms and to morbid appearances after death, 
we think it better, before we take up the several heads under 
which the society has expressed a wish that it should be consi- 
dered, to bring forward, as concisely as possible, cases which have 
fallen under our observation, and from which the opinions we 
shall have occasion to express when treating of those heads, will 
be chiefly drawn. 
Case 1. — Mr. S., in October, 1841, bought twenty bullocks at Peter- 
borough Fair, six of which were subsequently attacked with pleuro- 
pneumonia at different periods, varying from one to three weeks, 
after their arrival upon the premises. They were all observed to husk 
soon after being purchased ; but this was considered by the owner of 
no importance. 
Case 2. — In 1842 Mr. V. bought thirty-five Irish heifers at a large 
stock-market in the neighbourhood, most of which were shortly after 
attacked with disease of the lungs ; three died within a fortnight ; 
several others were afterwards disposed of whilst in pretty good 
condition, and on being opened their lungs exhibited appearances of 
the disease. 
Ca^e 3. — A cow belonging to a poor man of this town, Cambridge, 
fell ill on October 13, 1844, of pleuro-pneumonia, and after undergoing 
treatment for ten days, died. This cow was purchased a short time 
previously at St. Ives' market. 
Case 4. — Mr. H. bought thirty head of stock at Stamford Fair, on 
November 18, 1844. They were driven home to a distance of about 
thirty miles ; shordy after they were all observed to cough, some more 
so than others. Three died. 
