EDITORIAL OBSERVATIONS. 
509 
fell ill and died. He shortly after purchased another cow, 
and placed her in the same stable, but she also sickened and 
died. After this, he placed a calf in the stable, but this 
also perished; and at the present the stable remains un¬ 
occupied. 
2nd. Mrs. P. G., 12th Street, Brooklyn, had two cows 
and one calf in her stable in the end of February, 1879. 
When visited, one cow was very sick, and her destruction 
was secured, the stable being afterwards washed with disin¬ 
fectant liquids. The calf was disposed of for veal. Two 
months later, Mrs. G. purchased a new cow from a man who 
had kept her as a family cow for some years, and put her in 
the same stable in which the first had stood. Ten days 
afterwards she showed symptoms of disease, and, when 
slaughtered, showed the characteristic lesions of lung fever. 
e. Infection through the Manure. —Mrs. P., Franklyn 
Avenue, Brooklyn, kept eight cows, and had made no pur¬ 
chase since the autumn of 1878. On March 26th, one of 
her cows was found to be affected with lung fever, and was 
killed in consequence. The only appreciable source of con¬ 
tagion was the manure, which had been drawn from infected 
city stables, and spread on a lot where these cows were 
turned out on fine days for exercise. In spite of the plow¬ 
ing under of the manure as soon as the frost would allow, 
three more of her cattle had sickened, and had to be killed 
May 12th. As further evidence of the contagious nature 
of the affection in this case, Mr. K., her neighbour, who had 
visited and handled her first sick cow, has since lost one out 
of his herd of eleven, with unequivocal symptoms and 
lesions. 
We have very few comments to offer on this evidence , be¬ 
cause it contains its own refutation—a mere recital of a 
series of unconnected events cannot be advanced as proof of 
anything, and in the first place we take leave to say that 
we never, at any time, advanced any hypothesis on the sub¬ 
ject. Many years ago we stated that all the actual evidence 
relating to the progress of pleuro-pneumonia, pointed to the 
conclusion that the intervention of a living diseased animal 
is necessary for the propagation of the disease, and all the 
