768 
POISONING OF PIGS WITH COMMON SALT. 
acute form, but iu a state conducive to the throwing out of a 
large amount of the plasma of the blood, which coagulated 
on the surface of the mucous membrane ; and this morbid de¬ 
posit gradually increased, by the continuation of the diseased 
action, until it acquired its present thickness. If I am right 
in supposing it to have been a product of the mucous mem¬ 
brane of the bladder, I can understand that, when the 
abnormal action partially or wholly ceased, the bond of 
connection between the true and false membrane would be 
weakened, and perhaps slightly detached, very likely at the 
entrance of one of the ureters, when the urine, under such 
circumstances, would find its way between the inner surface 
of the mucous membrane of the bladder and the false mem¬ 
brane, until the whole of the latter would have become com¬ 
pletely freed from the surface to which it was attached, and 
be finally expelled from the bladder in the way stated in Mr. 
Perrins’ letter. 
I think that fibrinous exudations, the result of disease of 
the kidneys, would, when passed into the bladder, if not 
evacuated in a fluid state, coagulate in the form of flocculi, 
or in bands partially stretching across from one part of this 
viscus to the other. Shreds of lymph might occasionally 
have been passed with the urine, or they might temporarily 
obstruct its passage through the urethral canal; and if the 
bladder had been examined immediately after death, such 
flocculi might be found floating therein. 
I have thus very briefly stated my reasons for supposing 
that the false membrane was a product of the inner coat of 
the urinary bladder, the result of morbid action. I shall not 
attempt to account for the disease in the kidneys of the cow, 
nor the effect it had, or might have continued to have, upon 
the general health of the animal, had she been allowed to 
live; but, in conclusion, simply state that, so far as the 
morbid specimen is concerned, it stands alone—that is, I am 
not aware of another instance recorded in veterinary litera¬ 
ture. 
POISONING OF PIGS WITH COMMON SALT. 
By H. Pyatt, M.R.C.V.S., Nottingham. 
On 20th October I was sent for into the country to see 
some pigs, which were stated to be seriously ill from some 
unknown cause. 
