(2018) 
fpiration^ would not be more difficultly or flowly killed by the 
want of the Air, than othprsjwhich had been longer ufed to a free 
Refpiration 5 Wetook a thathad been kitten'd the day 
before, and put it into a very fmall Receiver (that we gueffed to 
hold about a pint or lefs) that it might be the fooner exhaufted. 
As foon as the pump began to play, I took notice of the time^and 
foundbya Watch , that marks Minutes and Qiaarter-Minutes 
within one minute or a little more after the Air firft began to be 
withdrawn., that the little Animal^who in the mean time had ga(p. 
ed for life, and had (bme violent convulfions, lay as dead with his 
head downwards, and his tongue out 3 but upon letting in of the 
Air, he did in a trice (hew figns bf lifejand being taken out of the 
Receiver quickly recovered ; And to allow him the benefit of his 
good fortune 5 we fent for a Kitlingof the fame age and litter 
which being put into the fame Receiver, quickly began, like the 
other, to have convulfions,after which he lay as dead 5 but ob- 
ferving very narrowly , I perceived fome little motions, which 
made me conclude him alive- which I foon found I had cau(e to 
doc For though we continued pumping, and could not perceive 
that the Engine leaked more than in the former Experiments 5 the 
Kitling began to ftir again, and after a while had ftronger and 
more general convulGons than before ; till at the end of full fix 
minutes after the Exu£tion of the Air was begun^ the Animal 
feeraing quite dead, the outward Air was readmitted into the 
Receiver, which not reviving him as it had done the other,he was 
taken out of the veflel , and lay with his mouth open, and his 
tongue lolling out without any fenfible breathing, and pul/ationj 
till having ordered him to be pinched, the pain or fome internal 
motion, produced by the external violence done to him , made 
hina immediately give manifeft figos of life, though there was yet 
no fenfible motion of the heart or the lungs ; but afterwards ga- 
ping and fetching his breath in an odd manner, and with much 
draining, as I have feen Ibme Foetus's do , when cut out of the 
womba he little by little, within abouta quarter of an hour^ reco- 
vered : wherefore thinking it fevere to make him undergo the 
fame meafure again , we fent for another , kitten'd at the fame 
time, and inclofing that alfo in the Receiver, obferved, that di- - 
vers violent convulfions, as it were gafping for breath, into which 
he began to fall at the fecond or third fuck , ended in a (eeming 
death; within about a minute and an hal£ But being made more 
diffident 
