[ 4^1 ] 
into which I put alfo a little Earth. It was not 
long before I was fenfible, from the Quicknefs with 
which it thruft itfelf into it, that I had fatisfied its 
Wants: However, from time to time, it came out 
agatn, and fwam about. I could not but admire the 
Livelinefs of all its Motions; and it was much like 
one of thofe little Eels , which, by the Micro- 
lcope, are difcovcred in Vinegar. I watched it thus 
above Six Weeks, when, by an unforefeen Acci- 
dent, I loft it : I was, however, already, in part, in- 
formed of what I hoped to learn; I mean, whe- 
ther this Worm, which 1 had brought into the 
World by a fort of C afar e an Operation, would 
not only continue to live, but would alfo acquire a 
greater Length ; and this I had feen happen ; for 
the Worm, which at firft was hardly a Line in 
Length, was above as long again, when I had the 
Accident of lofing it. It feems therefore natural to 
think, that if it had lived longer, it would have been 
a Worm exa&ly like that it came from. And I have 
looked upon this as the more probable, becaufe 
Thirds of thofe Worms have alfo produced others 
and exaftly like themfelves. 
I have examined fome of thefe little Worms with 
the Microfcope, and obferved Two Particularities 
in them, which I have thought worth Notice: \ft. 
Long Hairs placed on the Sides of the Body, Two at 
each Joining of the Rings, idly. That the Chanel 
of the Inteftines , the great Artery, ire. appeared 
interrupted for about 'Two-thirds of the Length of 
the Body, fo that for a Space, which to the Mi- 
crofcope appeared of about Two Lines, the Whole 
was fo tranfpaxent, that nothing could be diftin- 
guiflied 5 
