271 
ANEURISM OF THE AORTA, & C. 
And yet the local inflammation seemed to justify its continuance ; 
therefore it was persevered in without the least reference to either 
the pulse or the strong contraction of the heart. 
On the 22d the same state. This continued until the 27th, at 
which time the pulse seemed as if it had increased a few beats. 
On a more accurate examination this was confirmed, and was 
hailed as a very favourable omen ; indeed, expectation was greatly 
raised in consequence. 
On the 28th, the pulse had increased to 24, and the pulsation at 
the back seemed to have decreased in strength; respiration still 
16, but deeper and more regular : appetite had increased. The 
pulse now daily increased up to the 4th of March, on which day 
it had reached 40; the respiration was normal; the pulsation at 
the back had disappeared. The appetite had returned, and the 
patient was considered as “ cured,” all medical treatment being 
discontinued. With restriction as to diet, the case was dismissed. 
On the 30th, twenty-six days after she had been discharged, the 
mare, which had been put to her exercise in harness, did not go so 
well, and bore heavier on the reins than usual. On examination 
it was found that the pulse had again decreased to 36 per minute, 
and that some detached beats were also detected at the back. This 
led to the supposition that the inflammation had returned in the 
artery, and that the thrombus was again forming. The mare was, 
therefore, again put under the former treatment and restricted diet. 
On the 31st the pulse had decreased to 30; the pulsation at the 
back ranged from 8 to 10* and respiration had slightly increased. 
To avoid repetition, it will suffice to state that six days after this 
the pulse had decreased to 18; at the back it had increased to 18; 
and the respiration was likewise 18 per minute, and synchronic 
with the pulse. This state lasted till the 10th of April, at which 
time the pulse again increased, and the respiration became normal. 
The term of the relapse lasted eighteen days ; and if the mare had 
lost much condition in the first attack, she was now reduced to a 
skeleton. By care, however, she soon recovered her former condi- 
tion, and at the end of three weeks was again put to her usual 
quick service, in which she continued without any similar attack 
until October 7, 1848, when, through a kick received in the thigh 
from another horse, her tibia was fractured, and on account of this 
she was destroyed. 
The Autopsy shewed the posterior aorta of the natural size ; 
but its tunics were much thickened, hard, and inelastic at the 
part where the mesenteric artery is given off. The anterior me- 
senteric was, at its origin on the left side, considerably enlarged, 
forming a sort of cul-de-sac : its coats were hard and inelastic. 
The posterior or coeliac artery was also much distended at its ori- 
