( 477 I 
Sme Experiments mttde m the Air pmp UponVhni% together mth" 
arvAj of taking eoshaufied Receivers may from off the faid En^ 
gin I iryed by the fame Perfom mention d in Numb. 119. vfz» 
Mmfteny Hugens and M. Papin. 
I Took one day a foall Recipient fliaped like that, defci ibed for- 
merly *5 and inftead of an Iron wire,! pafled into ^ , 
the little hole a fprig of a known Plant, which was 119!% 44"^^* 
Baulme^Q as chat the Top of the plant was within the 
Recipient, and the Roots without. Then Iclofed the reft of the 
hole with cement, that fo I might keep ic void a good while : But 
becaufe l wasnot willing, that it fhou Id enibarafs the Engin, 'twas 
neceflary to find a means of taking it away when exhaufted. For 
that purpofe I ufed the following method, which is very fure and 
very commodious, and which hath ferved me for many other Ex« 
periments hereafter to be related. 
The method was this: I caufed the edges of the wide Orifice 
of my Recipient to be well ground, fo as that being applyed, it 
every where touched the Glafs-plate, which had alfo been very 
fmoothly groundto fervefora covertothefamc^ and I fpread a 
piece of Lambskin wetted over the faid plate, and having thus 
applyed it to the Engin, I put my Recipient over it : But in one 
place there was a Hail-fliot of lead^which kept the Receiver from 
iDeing exaflly applied to its cover, that fo the Air might more 
freely get out. And having afterwards whelmed another great 
Receiver over all , I caufed the Pump to be plyed. All being 
well evacuated, I fliook the Engin fo as that the little Receiver 
fell off from the Haii-fliotjand flood every where clofe to the skin, 
expanded over the cover of theXSlafs- plate. Then I had no more 
to do buc to fufier the Air to re-enter i^to the great Receiver, and 
this Air prelTing upon the little one, kept it fo clofely faflen'd 
to its cover, that ic was impoffible for me to fever them. And I 
am aflured, that the Air enters not into the fmall Receiver , w^hen 
'tis thus applyed upon the skin 5 for I have often put Gages in 
them, which alwaies kept at the fame height, although the Air was 
permitted to repafs into the great Receiver. You might alfo let 
alone the putting under of the Hail-ftot to keepup the little Re- 
Q^q q 2 cipient, 
