2G6 
ON DIAGNOSIS IN 
traction of the left ventricle of the heart. The blood meeting with 
an obstruction, against which it was vehemently forced, caused 
that sort of pulsation felt on the parietes of the back. By the 
dilatation of the same ventricle, the pressure being removed, the 
column of blood must have made a retrograde motion towards the 
heart, and have been the cause of the oscillations of the vessel in 
an anterior direction. However improbable this may appear to 
some, through there being no cases recorded in veterinary medi- 
cine in which a retrograde movement of the blood towards the 
heart in the large vessels had been observed, this case and the fol- 
lowing appear in favour of establishing such views. 
Case II occurred in a bay stallion, twelve years old. He had 
suffered for the last eighteen hours from what appeared to be colic. 
The pain was not very violent, but seemed from the beginning to 
have become gradually weaker, particularly in the posterior parts, 
which, as in the previous case, he dragged after him. When 
down, he lay quiet, but grunted a good deal and pointed toward 
his side. The pulse at first was a few beats less than normal ; but 
twelve hours after the attack it was increased to 50 per minute, and 
was full and hard, for which venesection had been had recourse 
to. Herr Rohling found the patient down, lying on the chest, and 
supporting himself against the partition ; looking anxiously towards 
his back, and grunting very much : the mucous membrane was very 
red ; the temperature of the body increased ; pulse 95 ; respira- 
tion 35 ; the air expired hot. By examining the region of the 
back, where the seat of the disease seemed to be located, a strong 
pulsation was observed, as if a large quantity of blood was forced 
from the heart into some large artery. This led Herr Rohling to 
suspect an aneurism of the mesenteric artery. The animal died 
on the L5th. 
The Sectio Cadaveris gave the same result as in the previous 
case. 
CASE III occurred in a carriage-horse, the property of a wine 
merchant. In this case the following information was obtained : — 
The horse had the day before made a short journey ; and when 
nearly to the end of it had begun to stagger, and in a fit of coughing 
had brought up a small quantity of blood through the nose. The 
animal was taken out, was allowed some bran, and at night was 
led home. In this there had been no recurrence of the former 
symptoms. But the next day he refused his food. The further 
information was, that at the time of the purchase, the horse, which 
was then five years old, had a cough, which the breeder said he 
had had from a foal. When six years old he became broken- 
winded. Besides this, he had an intermittent pulse. Herr Roh- 
ling concluded that the case was one of chronic affection of the 
