38(5 
THE ACCIDENTAL INTRODUCTION OF AIR 
Remarks . — From the absence of any diseased appearance in 
the brain, with the exception of a slight effusion, it is evident 
that the cerebral symptoms must have resulted from an imper- 
fect elimination of urea or the other elements of urine, owing to 
the diseased state of the kidneys. In all probability the mam- 
mary glands performed a vicarious function for several weeks, 
thus prolonging the life of the animal : the fact was rendered evi- 
dent by the effect of the milk on the lamb two days before her 
death. Whether the diseased state of the liver and spleen was 
primary or secondary is obscure. 
It is to be hoped that veterinary practitioners will direct their 
attention to renal diseases in animals. It is a branch of pathology 
that has long been most undeservingly neglected. Its investiga- 
tion will, doubtless, enable us hereafter to understand more cor- 
rectly the true nature of those anomalous cerebral affections 
which, in the present day, are too often inexplicable, and which 
serve to obstruct the path of science with doubt, difficulty, and 
danger. The excellent work of Dr. Christison should be perused 
by every veterinary practitioner. 
THE ACCIDENTAL INTRODUCTION OF AIR INTO THE LEFT 
JUGULAR, IMMEDIATELY AFTER BLEEDING PRACTISED 
ON THAT VEIN— DEATH SEVEN HOURS AFTER THE 
OPERATION. 
[ Communicated by Professor Bouley, of Alfort, to the Royal Academy 
of Medicine .] 
In the sitting of January the 29th, 1839, I had the honour to 
relate a fatal accident that occurred to a mare placed under my 
care, and that died immediately after bleeding, in consequence 
of the introduction of air into the vein. To-day it is my misfor- 
tune to present to you another fact of the same kind, and, if not 
identical with, yet analogous to the former, and which, I believe, 
may throw some light on the etiology of these serious accidents, 
which compromise at the same time the life of the patient and 
the reputation of his medical attendant. 
A grey mare, thick-winded, between fourteen and fifteen years 
old, was brought to my infirmary on the 24th of March, 1840, at 
eight o’clock in the morning. On the 22d of March she had 
been in harness about three hours, when, exhibiting symptoms 
of illness, she was taken home. She refused all nourishment, and 
