476 
REPORTS OF CASES. 
as it continued until it separated the hoof, together witli the cor¬ 
onary cushion, completely from the limb. 
All through this trouble the appetite remained firm, and had 
the animal been a mare, we would have continued treatment and 
watched results, but under the circumstances we advised him shot, 
which advice the owner in a few days followed. 
We would ask to have this disease named to us, and also that 
the readers of this article give us their experience of similar cases. 
It seems to us that the trouble must have been some specific blood 
disease, which lay dormant until tonic treatment stimulated it to 
action. 
We have seen no literature on the subject except a Canadian 
article, which described a case almost identical, but attributed it 
to frost, which in our patient is entirely out of the question. 
VERY LARGE CYSTIC CALCULUS EXPELLED BY NATURAL 
EFFORT. 
By A. W. Finley, D.Y.S. 
The spontaneous efforts of nature to relieve an organism are 
sometimes very wonderful and almost beyond belief. The follow¬ 
ing is an illustration: One of my customers has a mare, which 
at least for the last twelve months, has shown trouble in her 
function of micturation. She has been straining more or less to 
urinate, and at times has suffered from a constant dripping of 
urine, lasting for several days, during which the animal was con¬ 
stantly wet and nasty; and again she would seem .to improve and 
then urinate freely for a few days. Latterly the straining has 
been more frequent, the effort more vigorous, and her difficulty 
in urinating more marked. One morning the gentleman on 
going to the stable noticed that the mare had stopped straining. 
The lips of the vulva were covered with blood, and on looking 
on the floor, he found a large stone, which he brought to me. It 
weighed ten ounces, and measured between eight and nine inches 
in circumference. The calculus, is roughened on the outside, 
except on one surface. The animal had passed it during the night, 
simply by muscular straining. It seems hardly possible, but it 
