;
or else to one of the three calves which he sold to a farmer in North
Brookfield, Massachusetts, last June."

_2dly._ Apart from the importation into countries, we have this certain
proof--to which special attention was drawn several years ago--that
cattle-dealers' farms, and public markets, constitute the busy centres
of infection. Most anxious and careful inquiries have established the
proposition that in breeding-districts, where the proprietors of
extensive dairies--as in Dumfries, Scotland, and other places--abstain
from buying, except from their neighbors, who have never had diseases of
the lungs amongst their stock, pleuro-pneumonia has not been seen. There
is a wide district in the Vicinity of Abington, England, and in the
parish of Crawford, which has not been visited _by_ this plague, with
the exception of two farms, into which market-cattle had been imported
and thus brought the disease.

_3dly._ In 1854 appeared a Report of the Researches on Pleuro-Pneumonia,
by a scientific commission, instituted by the Minister of Agriculture in
France. This very able pamphlet was edited by Prof. Bouley, of Alfort,
France. The members of the commission belonged to the most eminent
veterinarians and agriculturists in France. Magendie was President;
Regnal, Secretary; besides Rayer, the renowned comparative pathologist;
Yvart, the Inspector-General of the Imperial Veterinary Schools;
Renault, Inspector of the Imperial Veterinary Schools; Delafond,
Director of Alfort College; Bouley, Lassaigne, Baudemont, Doyere, Manny
de Morny, and a few others representing the public. If such a
commission were occasionally appointed in this country for similar
purposes, how much light would be thrown on subjects of paramount
importance to the agricultural community!

Conclusions arrived at by the commission are too important to be
overlooked in this connection. The reader must peruse the Report itself,
if he needs to satisfy himself as to the care taken in conducting the
investigations: but the foregoing names sufficiently attest the
indisputable nature of the facts alluded to.

In instituting its experiments, the commission had in view the solving
of the following questions:--

_1stly._ Is the epizooetic pleuro-pneumonia of cattle susceptible of
being transmitted from diseased to healthy animals by cohabitation?

_2dly._ In the event of such contagion's existing, would all the animals
become affected, or what proportion would resi