232 ILLUSTRATION OF THE INFLUENCE OF IODINE. 
“ Two kinds of cataracts are described, with two corresponding 
modes of operating, but somewhat obscurely, from the affected 
quaintness of the terms. — We cannot close these brief allusions 
to Chinese farriery without felicitating the horse of this country 
on the changes which have taken place in the general mode of 
treating his disorders, since his frame and ceconomy became the 
subjects of enlightened investigation. Now, instead of the tor- 
tures which a stupid and ignorant set of leeches used to inflict 
upon him, kindness prepares his bed, and fair science ministers 
to his diseases.” 
AN ILLUSTRATION OF THE INFLUENCE OF IODINE. 
By Mr. W. Wardle, V.S., East Sheen. 
3d July, 1838. — A black cart mare was received into my 
infirmary, with a large callous tumour around the pastern joint 
of the near fore leg. She had been previously treated by a smith 
tit Fulham. There was one seton in the tumour when she 
arrived, but no discharge of matter ; I therefore determined to 
pass more setons. Three were immediately inserted, and dressed 
with ung. tereb. until the 26th of July. No alteration in its size 
having taken place, a strong blister was applied, and repeated on 
the 3d of August. 
13 th Aug . — No diminution whatever in size ; I therefore deter- 
mined to try the effect of iodine. 
An ointment composed of 3 X of potass, hydriod., with §vij of 
lard, was made — 3 lv was well rubbed in, and the quantity gra- 
dually increased daily until 3 x \j were used : xij grs. of iodine 
with 3 iij of gentian were given every morning at the same time. 
In seven days there was a marked improvement in my patient, 
the tumour being reduced nearly one-third. On the 3d of Sept, 
she was discharged, and recommenced her daily labour. I had 
frequent opportunities of seeing her, and perceived every time 
a further reduction in size. 
25th Oct . — Tumour scarcely perceptible: upon examining the 
joint with the hand, a small portion is to be felt, but very soft. 
Y7th Nov . — It has entirely disappeared, except that a slight 
thickening of the integument remains. 
