arately dwelt upon.

The eyes lose their transparency, the surface is white and opaque, the
sight is impaired, and the lids are nearly constantly closed. One or both
of the organs of vision may be thus affected; usually the two are
simultaneously affected, but seldom with the like intensity. After a few
days, and sometimes at the commencement, a small circular depression is to
be seen upon the very centre of the eyeball. It is round, and varies in
size from that of a pin's head to that of a small pea, but rarely becomes
larger. The depression, if nothing be done to check it, deepens till a
little shallow pit is exhibited. At other times the hole grows larger and
deeper, till the outer covering of the eye is absorbed, or, in common
phrase, is eaten through, and the water escapes: this gives relief. If,
however, the animal survives, the eye is often perfectly restored, though
very frequently a white speck marks the spot which was ulcerated; or the
dog is left with weakened eyes, and has a tendency to cataract, which may
ultimately render it blind.

The affection of the lungs is denoted by the dog breathing more quickly,
and often making a small plaintive or whistling noise during respiration.
Though cough is quite as often absent as present; but if present it is
usually severe; the pulse is increased, but small and thready, and the
appetite may not be impaired. The animal is, however, disinclined to move,
if put down at liberty, it always gets into some place where it hopes to
be allowed to remain undisturbed. As the symptoms become more intense, the
animal constantly sits upon its haunches; but I have not seen it carry the
head erect, although authors state this to be one of the indications.
There is a desire for fresh air, and the dog will always leave the house,
or get to the window or door, if he have an opportunity of so doing. These
signs are hardly to be mistaken, but they are easily confirmed. If the ear
be applied to the side of a healthy dog's chest, no sound can be detected;
but when the lungs are diseased, a very plain noise is readily heard. The
presence, therefore, of any murmur, or of anything like air escaping over
a dry rough surface, is indicative of disease, and the certainty that the
lungs are involved is confirmed.

Dogs of late years have not commonly died of pneumonia during the
distemper; but authors speak of the pulmonary form of the disorder as
having formerly been a common cause of death. I kno