188 ANEURISM OF THE POSTERIOR AORTA OF A HORSE. 
morbid phenomenon, and causes should by this time be 
pretty well known. 
In speaking of the articulations of the foot, it may be 
necessary to refer in greater detail to the anatomy of this 
part and its bearings on the production of disease. 
ANEURISM OF THE POSTERIOR AORTA OF A 
HORSE. 
By Messrs. Gowing & Son, M.R.C.V.S., Stucley House, 
Camden Town. 
On the 29tli of January last we were requested to see a 
brown gelding, age 27 years, the property of Messrs. Simpson 
and Weatherstone, corndealers. The man stated, at the time 
of our visit, that the horse had been voiding high-coloured 
urine, about a pint at the time. This condition of the urine 
had been existing about ten days. 
Upon examining the horse the visible mucous membranes 
were found to be normal in aspect ; the pulse at the sub- 
maxillar}^ artery was about 40 in number, and normal in its 
character. The horse was feeding tolerably well, and there 
was no indication of pain. 
The man was instructed to collect some of the urine and 
forward it to ns ; this was done, and some of the fluid, on 
being examined under the microscope, was found to contain 
blood-discs in considerable number, and also some crystals, 
both the circular and dumb-bell forms, of the carbonate of 
lime. 
We now requested the owners to send the horse to us 
for a further examination, and he was accordingly sent to our 
infirmary on the 2nd inst. The rectum was explored, and 
the bladder was found to be much distended. Pressure was 
made by the hand upon the viscus without any effort to uri- 
nate resulting. A catheter was then used, and the contents 
of the bladder drawn off. The fluid thus obtained was of a 
dark red colour, mingled with a quantity of mucus. Some 
of the contents was received into a vessel for further tests. 
The rectum was explored again, but no calculus could be 
detected in the bladder. 
Our opinion was now given to the proprietors that there 
might be some structural disease of the kidneys, or that 
the haemorrhage might arise from rupture of the capil- 
