368 
ON CATARACT 
As to the medical treatment, vve fear that Mr. Anderson says 
too truly, that if the existence of the tumour had been suspected, 
medicine would have been of little avail. 
Dr. Carswell, the Professor of Morbid Anatomy at the Univer¬ 
sity of London, who did us the favour to assist us in our exami¬ 
nation of the tumour, said, that in his experience (and this has 
been his chosen study), it was a unique specimen ; and that, 
generally speaking, in carcinoma of the spleen, that viscus in not 
materially enlarged. He has added a drawing of it to his 
already unrivalled collection of illustrations of the appearances 
and ravages of disease. Y. 
ON CATARACT. 
By Mr . Joseph Clay, F.5., Shrewsbury . 
I have great pleasure in responding to the call of Mr. Percivall, 
and send you some of the cases on which my opinion of the 
formation of cataract in the eye of the horse, without previous 
inflammation, is founded. 
By referring to your report of the trial at Shrewsbury, August 
1832, you will find that I stated in evidence, that I had known 
cataract form without active inflammation, or without any pre¬ 
vious apparent disease in the eye; and that I had detected 
small cataracts when the owner had not the slightest suspicion 
of any disease in the eye, and had denied that any previous 
inflammation had ever been observed; and also that I thought it 
not improbable that a small cataract, like the one in question, 
might form between the time that the horse was sold and that at 
which he was examined by Mr. Hickman. 
CASE I. 
A filly foal, the property of the Rev. Dr. Gardner, of Sansavv, 
had cataract in both eyes, without inflammation. This filly 
having run a nail into one of her fore feet when about a fortnight 
old, I was requested to see her. While waiting in the box for 
an assistant, I amused myself by looking at her eyes. There 
was not then the least appearance of cataract, or any other dis¬ 
ease of the eye; but in nine or ten days after this I observed 
a cataract in the near eye, about the size of a small pin’s head. 
My attention was then drawn to the off eye, but, after a most 
minute examination, I could not detect the slightest appearance 
of cataract in it; yet, about four or five days after this, when I 
again visited Sansaw, and, upon a second examination of the 
