(2030 
by we could be fure, that they were not Convuliive Motions- but thefe 
alfo ccafing upon the end of tnc fourth minute , the Bird was taken i 
and found irrecoverable. 
Experiment the 6th ♦ 
A Viper that was kept fo many hours in an Exhaufted Pveceivcr , tili 
it was concluded to be ftarkdead, and to have been fo for a good 
while, was neverthelefs refolutely hindered by me from being thrown 
away, till I had tryM, what could be done by keeping it all night in a 
glafs-body upon a warm digeftive Furnace. "Whereupon this Viper 
was found the next morning not only to be revived, but to be very live- 
ly, fo as to invite me to make with Her, without feeking for another^ 
the following Experiment. 
We put her into a tail Glafs-body, fitted with a Cork to the Orifice 
of it, and deprefsM with weight , fo that (he could come at no Air. 
In this cafe we obferv'd her from time to time-, and after fhc had been 
duck't a while, (he lay with very little motion for a confiderable fpace 
of time» At an hour and a quarter flie often put out her black tongues 
at near four hours Hie appearM much alive, and, as I remember^ about 
that time alfo put out her tongue, fwimraing all this while, as far as 
weobfervM, above the bottom of the water. At the end' of about 
feven hours or more , Hie fecm'd yet to have fome life in her , her po- 
fturc being manifeftly chang'd in the Glafs, from what it was a while 
before-, unlefs that might proceed from fome difference made in her 
Body as to Gravity and Levity. Not long after flie appeared quite 
dead, her head and tayl hanging down niovelefly, and diredly towards 
the bottom of the veffel, whilft the middle of the Body floated as much 
as the above- mentioned Cork would permit it, 
Hafte niaketh me pretermit the mention of divers things fuggefted by 
what hath been delivered upon the prefent Title,, But this one thing 
would be taken notice of , that, though fome of the aboveraentioned 
Animals feem,by the Relations we have given of them , to have been a 
little fooncr deftroyed by drowning, than any we have mentio'nd were 
by our Engin, that is no fure proof , that fufPocation does kill A- 
nimals fafter, than the deprivation of Air, they are expofed to in 
our Engin, For in drowning , that which deftroys is applyedto its 
full vigour at the very firft, and all at once ^ whereas^, our Receivers 
being made for feveral purpofes , the Deprivation of the Air , that 
they make , cannot be made ail at once, but the Air mull: be pump*fc 
out by degrees • fo that till the iaft the Receiver will be but partly 
emptied. For confirmation of which, I have this to alledge, that, ha- 
ving in the prefence of fome Virtmfi provided for the nonce a very 
fmall Receiver, wherein yet a Moufe could live fometime , if the Air 
were left in it, we were able to evacuate it at one fuck , and by that 
-advant?.ge we were enabled , to the wonder of the Beholders, to kill 
Uhe Animal in lefs than half a minute » 
