740 AN URINARY CALCULUS, AND ITS EXPULSION. 
I have adopted his treatment with success in acute 
cases. 
I take this opportunity of thanking Mr. Broad for boldly 
giving the profession the benefit of his unfailing success in 
the treatment of the chronic form of the disease, as his sug¬ 
gestion of raising the toe supplied my theory with the desi¬ 
deratum, thus affording the mechanical support the poor 
animal tried in vain to obtain for himself. Exercise by in¬ 
creasing the circulation would naturally tend to restore the 
healthy function of the blood vessels, and is therefore indi¬ 
cated ; but it appears important not to overdo it, as torpid 
action, or congestion, would be likely to follow. 
I have only given expression to my thoughts in the hope 
of inducing others to contribute their views on the pathology 
of the disease. 
AN URINABY CALCULUS AND ITS EXPULSION. 
By Richard Poyser, V.S., Royal Horse Artillery, 
Peshawur, India. 
Prefaced by the history of the expulsion of an urinary 
calculus from the bladder of a mare in the 3rd Bengal Cavalry, 
I have much pleasure in adding an account of the specimen 
which was kindly placed at my disposal by Colonel Hall, 
commandant of the above regiment. 
I regret the case did not come under my immediate observa¬ 
tion, but careful interrogation afforded the following remarks 
that refer to a bay country-bred mare, nearly fifteen years 
old, seven of which have been passed as a trooper. 
Up to the time of the passage of the calculus, which 
occurred without any manual assistance being rendered, she 
had neither been reported sick nor unfit for duty. Her usual 
W’ork was performed without any apparent inconvenience, and 
the functions of the urinary organs did not indicate anything 
abnormal. It is, however a matter of some surprise that the 
formation and retention of so large a foreign body should not 
have produced a series of untoward symptoms at a much 
earlier date. 
It was only two days prior to the expulsion of the stone 
that any evidence of pain or irritation, in connection with the 
urinary organs, manifested itself by general uneasiness, by 
the maintenance of a straddling attitude for various spaces of 
time, and the sharp switching of the tail which preceded 
