338 
H. E. SPENCER. 
generally exposure to cold draughts of air on a heated but not 
necessarily sweaty body, exposure to rain being more liable to 
cause pneumonia, pleurisy, etc. 
Semiology .—The symptoms of this disease are quite varia¬ 
ble, but upon examination of the tongue you will notice a purple 
or claret color, later petechia will appear on the Schneiderian 
membrane, and often in the mouth along the lingual gutter, and 
on the frsenum; then swellings appear around the nostrils, on 
the neck, belly and legs. These tumors are peculiar to this 
disease; they are about the -size of a hen's egg, well defined, the 
edges being very abrupt, pitting slightly on pressure, and are 
but slighly sensitive to the touch. They usually disappear and 
come again in twelve hours, but do not always appear in the 
same location as before, growing rapidly larger and coalescing 
until the legs are twice their normal size, the belly swollen from 
two to four inches, the line of swelling very abrupt as though a 
ligature had been fastened around, and the animal becomes very 
stiff and sore from the swelling around the joints. The head 
sometimes swells to an enormous size, especially about the 
inferior maxillary, making the animal resemble a hippopotamus 
more than a horse, and inconveniencing him greatly when feed¬ 
ing. The effusion around the glottis and nostrils sometimes 
renders breathing difficult. Thus far the temperature is but 
slightly elevated, if at all* the pulse normal, or perhaps only a 
little weaker; respiration is not altered if the oedema does not 
diminish the caliber of the nostrils or the glottis. The appetite 
is usually good and the animal seems to be in good spirits, but 
does not move much on account of the swellings around the 
articulations. After three or four days there appears a serous 
exudate of the skin over the oedematous parts that loosens the 
epidermis, which dries up and cracks; if this exudate is very 
extensive there will be ulcerated spots on the skin, the petechia 
on the Schneiderian membrane acting as an irritant and produc¬ 
ing catarrhal discharge. There may or may not be swelling of 
the lymphatic glands from absorption of the exudate. The 
temperature now may be slightly elevated, the pulse and respir- 
