( 2051 ) 
%nd found the Leech foraewhat faftened by her tail to that pare of the 
Glafs that was under water, and fometimes wandring about that part» 
which was quite above water ^ and ftill,when we endeavoured to excite 
her, (lie quickly manifefted her felf to be alive : And indeed (which will 
be thought ftrangej appeared fo lively after the full expiration of five 
natural days,thac expeding fomething might have happened to the Re- 
ceiver, and thereupon refolving to try how ftanch it had continued, I 
opened it under water, by which means the outward Air impelled in fo 
much of that Liquor,thatI was fatisfied, the Receiver was immediately 
before as well exhaufted^as others are wont to be ia our Pneumatical Ex- 
periments. 
The XVIIL title. 
Of what happened to fome Creeping InfeEls In onr Vacuum. 
Notwithftanding the great Variety of Reptills, that Nature does aL 
moft every where produce ^ yet the inconvenient time and place, where-» 
in the following Tryals were made,fuppiyedme with fo few, that about 
thefe Animals I find among ray Adverfaria no more then the enfuing 
Notes. 
Experiment i. 
V/e took five or fix Caterpillars of the fame fort j but I could not tell 
to what ultimate fpeci'es the Writers about Infeds referred them. Thefe 
being put into a fcparable Receiver of a moderate fize, had the Air 
drawn away from them, and carefully kept from returning. But notwith- 
ftanding this deprivation of Air, I found them, about an hour after, mo- 
ving to and fro in the Receiver and even above two hours after that, 
I could by fliaking the Velfel, excite in them fome motions, that I did 
not fufped to be Convulfive. But looking upon them again fometimc 
before I was to goto bed ( which may be was about lo hours after they 
were firlt included ) they feemed to be quite dead, and, though the Air 
were forthwith reftored to them, they continued to appear fo, tilll 
went to Bed yct,for Reafons elfewhere expreffedj thought fit to try, 
whether time might not at length recover chera, and leaving them all 
night in the Receiver,! found the next day, that 3,if not 4 of them, were 
perfedly alive. 
Experiment 2. 
We took from an hedge a branch, that had a large Cobwebb of Ca» 
terpillars in it,and having divided itinto two parts, we put them into 
like Receivers, and in one of them fliut up the Caterpillars together 
with the Air, which from the other was exhaufted. The event was. That 
in that which had the Air,the little and difficultly vifible Infeds, after a 
fmall time, appeared to move up and down as before, and fo continued 
to do for a day or two ^ after which, other occafions made the Experi- 
ment to be negleded : whereas that Glafs whence the Air had been 
drawn oat,and continued kept out, fiiewed after a very little while no 
motion that we could perceive. But to try, Whether Caterpillars may 
continue fo far alive ia our Vacunm all the winter, as the next Spring 
Z .or 
