VETERINARY SCHOOL AT ALFORT. 673 
and gelatinous infiltration, which separated it from the muscular 
coat, and extended nearly four lines into that coat, and the firm¬ 
ness of which was very remarkable. 
'Aneurism of the Aorta. —A horse was affected with colic. 
M. Maillet, in exploring the rectum, detected in the sub-lumbar 
region an extra intestinal tumour, which he regarded as an 
aneurism. The horse voided, from time to time, clots of blood by 
the anus, and died six days after his arrival at the school. On 
opening him, M. Renault found on the abdominal aorta, and at the 
commencement of the mesenteric arteries, a spheriod aneurismal • 
dilatation as large as a man’s head, filled with concentric fibrinous 
clots, and adhering to the descending portion of the colon, through 
a great part of its extent. About the middle of this adhesion 
was an opening, the organized borders of which shewed that it 
had been of long duration, forming a communication between 
the interior of the aneurism and the intestinal canal. 
Ascites. —Abdominal effusion is frequentaniong dogs. When 
it is not connected with any serious organic lesion, it ordinarily 
yields to the employment of preparations of squills, whether ad¬ 
ministered internally or used as a liniment. On tw'o of these 
animals, that had exhibited palpitation of the heart, this treatment 
failed. On opening them, an effusion of more than two pounds 
was found in the pericardic cavities, and numerous false mem¬ 
branes of long standing between the heart and its enveloping 
membrane. 
Caries of the Nose. —In three horses admitted into the 
hospital during this year, M. Renault observed a lesion very fre¬ 
quent, but which has not engaged the attention of veterinary 
surgeons; namely, caries of the cartilages forming the base of the 
alae of the nose, and produced by the bite of other horses, or some 
external injury. A wound of this kind, although very simple in 
appearance, is often very difficult to heal. One of these horses 
remained two months in the hospital, and was dismissed without 
the slightest relief. Two other horses, after being with us three 
months, were dismissed, some progress having been made towards 
the healing of the ulcer. We cannot speak as to the perfection 
of the cure, but they are at work. 
Toxicology. —At the commencement of the year M. Renault, 
in conjunction with the Professor of Chemistry, instituted a 
course of experiments on poisoning with arsenic. Their object 
was to ascertain the effect of arsenic on the economy, and the 
degree in which we could rely on the liydrate of the peroxide of 
iron as an antidote ; the result of the experiments was— 
I. That, as it regards the horse, the arseniate of arsenic was 
a more active poison than the arsenious acid. 
