poison left in the trough, or other places
where the diseased animal has been brought in contact with some object,
as is often the case in glanders in the horse; the matter discharged
from the nose, and left upon the manger, readily communicating that
disease to healthy animals coming in contact with it. Contagious
diseases, therefore, travel very slowly, starting, as they do, at one
point, and gradually spreading over a large district, or section of
country.

This disease is, however, regarded by the author as infectious; by which
term is meant that it is capable of being communicated from the diseased
to the healthy animal through the medium of the air, which has become
contaminated by the exhalations of poisonous matter. The ability to
inoculate other animals in this way is necessarily confined to a limited
space, sometimes not extending more than a few yards. Infectious
diseases, accordingly, spread with more rapidity than contagious ones,
and are, consequently, more to be dreaded; since we can avoid the one
with comparatively little trouble, while the other often steals upon us
when we regard ourselves as beyond its influence, carrying death and
destruction in its course.

The term by which this disease is known, is a misnomer. Pleuro-pneumonia
proper is neither a contagious, nor an infectious disease; hence, the
denial of medical men that this so-called pleuro-pneumonia is a
contagious, or infectious disease, has been the means of unnecessarily
exposing many animals to its poisonous influence.

In the _Recueil de Medecine Veterinaire_, for 1833, will be found a very
interesting description of this fatal malady. The author, M. Lecoy,
Assistant Professor at the Veterinary School of Lyons, France, says:
"There are few districts in the _arrondissement_ of Avesnes where more
cattle are fattened than in that of Soire-le-Chateau. The farmers being
unable to obtain a sufficient supply of cattle in the district, are
obliged to purchase the greater part of them from other provinces; and
they procure a great number for grazing from Franche Comte. The cattle
of this country are very handsome; their forms are compact; they fatten
rapidly; and they are a kind of cattle from which the grazer would
derive most advantage, were it not that certain diseases absorb, by the
loss of some of the animals, the profits of the rest of the herd.
Amongst the diseases which most frequently attack the cattle which are
brought from the North,