itement of disease in a great measure
disguises the other symptoms. The dog may even, to an unpractised eye,
seem to possess considerable strength; for it resists, with all its
remaining power, any attempt to move it, and its last energies are exerted
to support the attitude that affords the most relief to the respiration.
At length the poor brute stubbornly stands until forced to stir, when it
drops suddenly, and for several moments lies as if the life had departed.
Again it falls, but again revives; and always with the return of
consciousness gets upon its legs; but at last it sinks, and without a
struggle dies.

The lungs have been, in the first instance, inflamed, but the pleura or
membrane covering the lungs, and also lining the chest, has likewise
become by the progress of the disease involved. The cavity has become
full of water, or rather serum, and by the pressure of the fluid the
organs of respiration are compressed. It is seldom that both sides are
gorged to an equal degree; but one cavity may be quite full while the
other is only partially so. One lung, therefore, in part remains to
perform the function on which the continuance of life depends; and if, by
any movement, the weight of fluid is brought to bear upon the little left
to continue respiration, the animal is literally asphyxiated. It drops, in
fact, strangled, or more correctly, suffocated; and as the vital energy is
strong or weak, so may the dog more or less frequently recover for a time.
In the end, however, the tax upon the strength exhausts the power, and the
accumulation of the fluid diminishes the source by which the life was
sustained. After death, I have taken from the body of a full-sized
Newfoundland one lung, which lay with ease upon my extended hand; while
the two held together afforded a surface sufficient to support the other.
The condensation was so great that the part was literally consolidated,
and the fluid which exuded on cutting into the substance was small in
quantity. The blood-vessels were, with the air-cells, compressed, and
while the arterialization of the blood was imperfect, the circulation was
also impeded.

The causes usually assigned to account for inflammation of the lungs will
not, in the dog, explain its origin. I have usually met it where the
animal had not been exposed to wet or cold; where it had not undergone
excessive exertion, or been subjected to violence. Extraordinary care as
rather seemed to induce, than t