646 
EDITORIAL. 
reason as soon as the history of a patient is heard and is accom¬ 
panied by the detection of its intermittence with its spells of re¬ 
mittance and aggravation, by its gradual but sudden apparition 
by work, followed by its disappearance with rest, by the excruci¬ 
ating pain which accompanies it, by the profuse perspiration over 
the anterior part of the body, with-the cold manifested over the 
limbs where the circulation is deficient, the loss of pulsation on 
the arteries of the affected parts, the expressive sufferings of the 
countenance, etc., etc., all those tell rapidly of the diagnosis, 
which is finally positively established by a rectal examination al¬ 
lowing the exploration of the principal seat of the disease, the 
posterior aorta, and reveals also the cause, viz.: the reduced or 
prevented circulation, by the presence of a thrombus, of various 
size and extent in the main blood vessel supplying the region, and 
also in many of its ramifications, obstructing more or less the 
lumen of the vessel and interfering with the circulation, thrombus 
resulting from the obliterating endo-arteritis, whatever may have 
been the original cause of the inflammation of the blood vessel. 
Such is in brief intermittent peripheric lameness by ischemia , 
that which we all know and that has been observed in the large 
species of our domestic animals. 
But to answer the question, whether those are the only ones 
that are affected with it, Dr. V. Ball, professor at the Lyon 
School, has recently published in the Journal de Zootechnie the 
history of one case in a dog. 
It was a nine-year-old slut, which since a month had exhibited 
some difficulty in walking. She was stiff in her hindquarters. 
Soon the walking became more difficult, and the animal dropped 
down on her hind legs. After a few moments of rest, she was 
able to renew her promenade; soon to drop down again. Finally 
the condition grew so bad (the slut becoming almost paraplegic) 
that she was brought to the doctor for treatment. She died after 
a few days. The lesions were concisely as follows: Thrombosis 
of the anterior aorta, complete obliteration of the abdominal aorta 
and of the terminal portion of the thoracic, the two external iliacs 
are entirely obliterated, the internal iliacs also, but less extern 
