554 
OBSTINATE AND DANGEROUS CONSTIPATION. 
Hydrarg. chlorid 3 j 
Opiipulv ./ gr. x. 
Palv. gentian, 
Pulv. zingib. a“a 3ij 
Terebinth, vulg. q. s. ut f. bol. 
16^/t. — Last night, at ten o’clock, I left my patient with little 
hopes of seeing him alive this morning : at seven o’clock, how- 
ever, I received a message that the horse was not only alive, but 
was “ better,” he having had an hour before a brisk 'purgation. Of 
course, all medicine was discontinued. He had taken Jive balls — 
five drachms of calomel, combined with fifty grains of opium ; and 
eighteen hours after the exhibition of the first dose purgation had 
come on ; and from that time to the present — the 18th September 
— the animal has been purging moderately, without having had 
any very large evacuations, although fecal matter, one would think, 
must have been long pent up. To-day, at noon, for the first time 
his dung is becoming of the pultaceous character, characterised 
from healthy dung only in having a sour offensive odour. 
So great a friend to calomel and opium practice as I have now 
become, I must confess I ascribe this horse’s recovery to it ; and for 
the suggestion at the moment I hold myself indebted to Mr. Gloag. 
Whether or no, in cases of the description of this one, we should 
be warranted in having recourse to it at once , after our boasted 
antispasmodics had failed to afford relief, I hardly dare say. The 
subject of the present case took 12 drachms of aloes, 12 ounces of 
sulphuric ether, 8 ounces of laudanum, 1 ounce of chloroform, and 
half a pint of olive oil, besides experiencing the fumes of 6 ounces 
of the strongest tobacco, before calomel and opium were exhibited ; 
nor did he evince any signs of action of his bowels, containing all 
this medicine, before the latter had been for some hours adminis- 
tered. 
COMPARATIVE PATHOLOGY, 
ELUCIDATED BY INJECTION OP COLD "WATER INTO THE UTERUS. 
By Edward Mayhew, M.R.C.V.S., Spring-street , 
Wesibourn e- terrace. 
To the Editor of “ The Veterinarian .” 
Sir, — COMPARATIVE anatomy is a recognised branch of the 
medical science that has been long pursued, and which, if not per- 
fected, is evidently progressing towards perfection. The advantages 
derived from such study are universally acknowledged, so that to 
be in some measure acquainted with it, may almost be said to con- 
stitute a proof of a liberal education. It is strange, however, that 
another branch of science no less instructive in its disclosures, and 
