HYDATID, OR TUMOUR ON THE BRAIN. 467 
knife, and cut freely into the ossific deposit, commencing at the 
anterior part, and moving the knife to and fro on the lateral parts 
of the cartilage, nearly severing it asunder. There is extensive 
hemorrhage during the operation, it being necessary to apply a 
bandage to stay it. 
In order to complete this pperation, the foot should be well 
dressed, the sole pared thin, and the commissure freely opened, 
and Turner’s unilateral shoe applied. The ointment was used after 
a few days, as above. This treatment I have found a complete spe- 
cific. The lameness is immediately removed, and the substance 
gradually disappears. I could relate three or four cases, were it 
necessary; but perhaps this feeble hint may induce others to test 
it ere long. In the mean time, I anxiously wait the result. This 
is a valuable improvement in veterinary practice, and its discovery 
I must be permitted to claim; for, I think, the operation is not on 
the records of our art. I must leave it, however, to the inquiries 
and experience of my brethren to test its real worth. 
P.S. During the discussion of my paper on the hock of the 
horse, Mr. Cheetham contended that the ligaments have little or 
nothing to do with spavin. May I beg to call that gentleman’s 
attention to the Abstracts of the Proceedings of the Veterinary 
Medical Association for 1837, p. 153 ; he says, “ spavin was not, 
so much as had been imagined, a disease of the mucous mem- 
branes of the cushion bones, it was, primarily, a ligamentous dis- 
ease;” and, at p. 154, in answer to some questions put by Mr. 
Holmes, he says, “ the disease is in the ligaments, and they are the 
first to become ossified.” Mr. Cheetham questions the majority of 
veternary surgeons’ knowledge of the hock. Will he enable us to 
share in the new light which has burst upon him? 
ON THE HYDATID, OR TUMOUR ON THE BRAIN. 
By Ben Ledi. 
The hydatid, or tumours on the brain, is a disease very fatal 
to sheep, and other animals, and well worthy of a better pen than 
mine ; yet I cannot but think it is a subject which has not had 
proper attention paid it by the majority of our authors on veterinary 
matters, and lecturers on animal pathology, who pass over it with 
little regard, merely informing their class, that it is a dangerous 
disease, and always terminates fatally. To this I offer my pro- 
test, and will endeavour to give a few brief remarks on the sub- 
ject, the knowledge of which I obtained from actual practice. 
