(2028) 
the Open Air, we exhauded the Velfel, and fa that, thbagh tl*e heart 
grew very tumid, and here and there fcnt forth little Bubbles, yet it 
continued to beat as rnanifeftly as before , and feemed to do fo more 
fwiftly. as we trycd by numbring the pulfations it made in a minute , 
whilflit was in the exhaufted Receiver , and when we had readmitted 
the Air, and alfo when we took it out of the Glafs , and fufFered it to 
continue its motion in the open Air. The heart of an other Eele , be- 
ing likewife taken out, continued to beat in the emptied Receiver , a$ 
the other had dorfcv pi^^ '^f ^ ^'^ M 
^ Experiment the 1. 9 
The Heart of an other Eele, after having been included in a Receiver 
firft exhaufted, and then accurately feeured from leaking, though 
it appeared very tumid, continued to beat there an hour ; after which 
looking upon it and finding its motion very languLd,aild alrno-ft ceai*ed, 
by breathing a little upon tllat part of the glafs where the heart was, it ^ 
«][urckly regained motion, which 1 obferved a while and an hour after j| 
finding it to feem almoft quite gone , I was abl-e t-o renew it by the ap«fl 
plication of a little more warmth. At the end of the third hour, com-H 
ingto look at it once mOre, a bubble, that appwred to be placed be-%S 
tween the Auricle and the Heart, feemed to have now aad then a little 
trembling motion- but ! found it fo. faint , that I couW no more by 
warmth excite it, fo as plainly to perceive the heart to move ; where- 
fore I fuffered the outward Air to rufli in , but could not difcern, that 
thereby the heart regained any fenfible motion, though aflifted with the. 
warmth of nay^ breath and hands. 
The X. Title. 
4 'Com far if in the Times wherein Ammals^maj be lqll*d 
Dnovpmngj or withdramjng of the ^ir^ 
TO help my felf and others to ffldge the better of fome difficulty's 
concerning Refpiration , I thought it might be ufeful , that we 
QOmpar'd together the Times , wherein Animals may be kili'd by that 
nant^o^ Refpiration.i which in thofe diat are drownM is caufed by the 
water that futfocates them, 2ind that her wznt ^ which proceeds from; 
withdrawing the ambient Air. Of the latter of thefe a fufficient-num^ 
ber of Inftanccs is to be metwith among our other Experiments , and 
therefore I ihall now fubjoyn a»bout the f<??-»?<fr the more Tryals, becaufe. 
this Gomparifon hath not J that I know of, been yet thought on by 
any. 
Experiment the: i» 
Sfpf* 10" , A Green-Finch^ having his legs and wings tyed to a weight, 
was gently kt down into a glafs-body fili'd with water the.; 
time. 
