48 
ANEURISM OF THE AORTA. 
ventricles of the brain injected, as was also the spinal mar¬ 
row ; the membrane lining the frontal sinuses and ethmoidal 
convolutions highly injected ; the nasal meatus dilated; the 
inferior cornu of the left nostril, as well as the membrane itself, 
presented some superficial ulcerations ; the lymphatic glands 
of the throat and breast were pale but firm; the par vagum 
palely reddened. 
ANEURISM OF THE AORTA. 
ON the 31st of August, 1826, a mare was brought to the Col¬ 
lege at Alfort, very lame from a sinus in the foot, between the 
frog and sole, two inches deep, running in a direction backwards, 
from which issued a black, fetid, purulo-sanious matter. This 
was attended with fever, for which she was bled. The next day 
it was discovered that the long flexor tendon was perforated; 
and that synovia was escaping. This was followed by slough¬ 
ing of the tendon and exfoliation of the navicular bone. The 
foot was poulticed and fomented, and bound up with tow : the 
bloodletting was twice repeated, and acidulated mucilaginous 
drinks and some clysters were administered.—On the 20th 
September, the case continuing unrelieved, while in the act 
of dressing the foot, the animal suddenly reeled, tossed up her 
head and fell. No sooner, was she down than her nostrils, 
and the muscles about the breast and abdomen, were convulsed 
by alternate contractions and dilatations; her limbs stretched 
out, and the eyes rolling within their orbits. The jugular was 
instantaneously opened: only drops of blood issued. Death, 
in the very act, closed the scene'. 
Examination, The pericardium prodigiously distended with 
coagulated blood, assuming the form of the exterior of the 
heart, and looking altogether like hypertrophy of that organ. 
The coagulum weighed 5lbs. The trunk of the aorta at its 
base was ruptured to the extent of its circumference: and the 
rupture was evidently the result of attenuation of the vessel. 
Within the right ventricle, one of the chords passing from the 
side to the septum, was found as large as a goosequill, and en¬ 
tirely fleshy. 
The synovial lining of the navicular joint was reddened, and 
