390 SNAKE rm a HORSE’s EYE. 
thirty years ago, of about twenty inches long and near 
three in circumference, recorded in the medical eflays of 
a fociety of phyficians in London. This worm I have 
feen ten years after preferved in fpirit, in the anatomical 
cabinet of the celebrated Dr. William Hunter of that place; 
and thirdly, I refer to the hiftory and engraving of one 
exactly fimilar, as large as the life, inferted in the fecond 
volume of Edinburgh medical eflays, plate fourth; and. 
laftly, to autopfy, by examining the eye of the horfe in 
queftion, which will afford ocular demonftration of the fact. 
I fhall add to thefe fome obfervations of that prince of 
anatomifts in his day, the famous Ruyfch, who, as Dr. 
Haller attefts, from a practice of diflection continued for 
near eighty years, with a diligence, fkill and accuracy in 
examining into morbid bodies, and the nicenefs of his. 
diffections and of his anatomical inje€tions, exceeded all 
his cotemporaries ; and in fine, whofe teftimony in thofe 
matters was looked upon by Boerhaave and Haller, and by 
every medical writer fince, to be as inconteftible authority 
as that of any other perfon whatfoever. 
In his firft volume, obfervation the 16th, he fays, * daily 
experience proves that worms may be generated in all parts 
of the body. I ftrangled a dog that was very lively three 
hours after being fed, with a view to examine the lacteal 
or milk veflels. On opening the belly of it a live worm, 
at leaft two fpans in length, fkipped out. I could difco- 
ver nothing amifs in the omentum, nor any folution of 
continuity of the parts; and both the mefentery and in- 
teftines were found.” 
Again he fays, obfervation 54, ‘I have had room to 
doubt whether, as Harvey and his followers affirm, all 
animals are produced out of an egg, from worms being 
found in the arteries of living horfes; as alfo from worms 
feen in the parenchyma, or the glandular fubftance of the 
liver, as it is now called, and allo in the cyftic du& and 
biliary pores of fheep, and very often in the gall-bladder. 
1 remember 
