WORM IN THE EYE OF THE HORSE. 197 
■ bth. Have you ever found similar worms in the bloodvessels^ 
or ill the blood when it has been drawn? 
I have never found worms similar, either in the blood¬ 
vessels or the blood when drawn. Worms of a different cha¬ 
racter are sometimes found in the coeliac artery of the horse, 
both at home and in this country ; and Mr. Moorcroft informed 
me they were often found at home (in Europe) in this situation. 
They are larger, thicker, and more opaque than the worm of the 
Qth, Do you know of any particular situations where the 
disease prevails more than in others; and have you reason to 
suppose that any particular description of food or water may be 
productive of the disease ? 
I know from experience that the disease does prevail more 
at particular situations than at others : at Poosah, in the dis¬ 
trict of Tirhoot, the disease is much more frequent than up in 
this part of the country. At Poosah, there have been upwards 
of thirty cases of worm in the eye among the young stock 
during the present cold season; while up here at the depot, 
there has not been a single case within the same period. I am 
- not disposed to think, nor have I seen any cause to believe, that 
any particular description of food or water is productive of the 
disease. It appears to me to depend on climate and situation 
more than on any other circumstance, and to have a connection 
with particular seasons of the year, as I shall mention in my 
letter.’’ 
1th. When the worm exists in the eye, what is the best mode 
of extraction, and do you know if a cure can be performed by 
medicines ? 
The best mode of extracting the worm is by puncturing the 
eye with a common bleeding lancet, the incision being made on 
one side, so that the small speck which generally attends the 
puncturing of the cornea, may not interfere with vision, or as 
little as possible. In operating for the extraction of the worm, 
I never throw the horse, or use any means of fixing the eye. 
With my left hand I raise the upper eyelid, and make an assist¬ 
ant depress the lower; I then watch for an opportunity to 
puncture the cornea, behind, and about a line’s breadth, or a 
a little more, from its junction with the sclerotic coat. At the 
time the puncture is made, I press the ball of the eye with my 
left hand, which causes the aqueous humour to spurt out with 
greater force, and gives a better chance of the worm coming out 
with it. 
I have been very successful in extracting the worm in this 
way ; and so perfect has tlie operation been, that in many in- 
