226 
REPORTS OF CASKS. 
would give rise to a special sensibility and principally to an in¬ 
crease in the circulation of the blood, quite abundant in some 
parts of its extent. 
Every portion of the gastro-intestinal ground is adapted and 
appropriated to a special system of circulation whose numerous 
anastamoses and capillary networks carry in each living molecule 
of the stomach and intestines the elements necessary to it. Veins 
are relatively considerable and constitute in ramifications the sys¬ 
tem of the vana porta; the lymphatics are numerous and their 
vessels collect to the reservoir of Pequet. Nerves rise from the 
solar and semi-lunar plexuses, forming themselves by a division 
of the great sympathetic and of the pneumo-gastric. They give to 
the mucous membrane a sensibility which, obscure and latent in 
normal condition, may be so transformed and perverted in their 
action as to give rise to the most excruciating pains. 
Sucli being the organization, one may readily understand how 
all these organs, so beautifully arranged by nature, may undergo 
such pathological modifications as may at any moment disturb 
and prevent the perfect execution of their functions. It is these 
functional troubles of various orders that cause the morbid phe¬ 
nomena to which the familiar name of colics has been given. 
(To be continued .) 
REPORTS OF CASES. 
CYSTIC CALCULI. 
By Dr. F. W. Derr, Veterinary Surgeon. 
On June 6th I was consulted about a grey mare of Norman 
breed, six years old, that had been for a year past discharging 
blood while at work, and for two months had a dribbling of the 
urine while at work; did not discover much while standing in the 
stable. Such is the history of the case Mr. C. M - related 
to me, from which I made out a case of cystic calculi, which I told 
the owner, and which diagnosis proved correct after making an 
examination. 
I had her prepared by keeping her off work for a few days, 
with light food and laxatives, so that when she was brought to the 
