MIDLAND COUNTIES VETERINARY MEDICAL ASSOCIATION. 769 
It was not until the month of August following that I was called 
to the house of the farmer who bought the second cow. I found an 
animal very ill ; had suspicions; isolated her; saw her again, and 
decided on her disease ; a post-mortem examination verified my 
opinion ; this cow had been on the farm two years. I questioned 
the owner, who said he had bought a cow early in June. “Where 
was she V* “In the pasture with the others.” “Had she been 
unwell?” “Soon after I bought her she hoosted a bit ; I thought 
she had taken cold. I nursed her a day or two, and she appeared 
to go all right ; however, she had not milked so well as she ought, 
but she had been with the rest ever since.” I examined her, and found 
cavernous respiration in one lung; otherwise she looked tolerably 
well. From this time this man’s herd of forty cows began to dwindle 
away. I rowelled and drenched a number that seemed healthy ; put 
them in one lot, but it was of no avail ; little good was done ; some 
were slaughtered, some were sold, and went away alive, and some 
few had the disease mildly, and recovered, and the cow which was 
doubtless the cause of all this mischief was again ill with pneu- 
monia in the other lung. It soon made short work of her, and a 
post-mortem examination revealed the ravages of her former 
disease. 
In the same month of August I was called to the farm of the 
magistrate before mentioned to see a favourite cow that was very ill 
with a swelling around the front of her neck, extending from the 
sternum nearly to the larnyx ; respiration and deglutition were most 
difficult ; nothing but fluids could be taken ; the swelling was 
oedematous, and could be seen to increase daily ; treatment was of 
no avail. The case was seen alive and dead by another veterinary 
surgeon, who said it was not contagious pleuro-pneumonia. I held 
to the opinion that it was a case of contagious exudative pleuro- 
pneumonia, notwithstanding the bulk of the exudation was extra 
thoracic ; in the areolar tissue around the esophagus and trachea, 
when the swelling was cut obliquely, the exudation matter had the 
appearance of being arranged in consecutive layers. I also observed 
that the free border of the lobes of one lung were infringed for half 
an inch in depth with pleuritic effusion — clear evidence to me of the 
nature of the malady. In less than a week our disputation was set 
aside by the occurrence of a clear case of the disease in another cow 
of the same herd, and in about a month the whole lot (seven) save 
the cow bought from the dealer in the spring were swept away. I 
now examined the animal which seemed so miraculously to have 
escaped, and found in auscultating one side of her chest a bronchial 
rale, cat’s purr, and leathery function sounds, evidence together with 
her history and condition of the disease under which she had been 
labouring. 
The insight I gained by studying the history of these three cows 
convinced me that the means of propagating the disease were as 
follows : First, from the cow retained by the dealer, although she 
was pastured for a fortnight, and that fortnight the last of her in- 
crementary (incubative) period, she failed to communicate the 
