(204^) 
quiet ; bat, which i$ more, whereas .when he was pit in,the tremblingf former* 
ly mentioned were yet cipon him and concinoed fo for feme time ; yet after- 
wardsin fpighc of the Expanfion of the Air he was then in, they Icfc him early 
enough And when ihs Internal Receiver was taken oat, he did not only reco- 
ver from h s fainting fit fooncr then before • bac cfcapcd thafc fubfequent 
tremblings we have mentioned. 
Exferiment 4» 
fncouraged by this fuccefs,afcer we allowed him fome time to recolleft bif 
' ft eng h. we reconveyed him and the odd vefTcl, whe einhe was inclade4> into 
the former Receiver^and pumped out the Air, till the Mercury in the Gage 
was not only drawn down as low as formerly ; but near half an Inch lower, 
that there the Air ra gh be yet furth!r expanded, than hitherto it bad been* 
And tho'jgh this d'd at firftfeem to difcompofe our little Bcaft- yet after a 
while hegrcw very qQier,and conun»:ed fo for a full quarter of an hour .-when, 
being defir ius to try what operation a further Rarefadion of the Air would 
have upon him, we caafeJ three EifuAioni mo'-e to be made by the Pump, be- 
fore we difeovered him to be in manifcft danger, ( at which time the Bladder 
appeared much fuller then before ^ ) but then we were obliged to let the Air 
into^the outward Receiver ; whereupon the Moafe was more fpeediiy rcvi- 
ved then one would have fufpedcd» 
And thefe tryals of the Power of Aff efadion feemcJ the more confider. 
able, becaufe the Air^tn wh ch ihe Moufe had all thii while lived,had been clog- 
ged and infcded with the escrcmentitious Etti wi'ims of his Body . for 'twas 
the fame all alorg,wc hav ng purpofely forborn to t^^keoff the Bladder, whofc 
regular Tntun efcencies and fbnnkingsfufficiencly mamfefted, that the vcffel, 
whereof 'twas a part, did not leak 
P O S t S C R I F 
Though the fuccefs of the recited Experiments is very promijtng % jet a fnb' 
feq^ent Trjal or two^evh fe particularities are flipt out of my memory ^ oblige me^ 
in point of Candour ^to declare^ thaty for furtherfatisfa^ion^ the Tryals cf the 
pow r of Accuflomance in reference to Air nn^tfor Refpiratian^ onght to be both 
reiterated^and to be made in differing forts of Animals, 
The XV» Title* 
Some Experiments Jhewlng^that Air ^become unfit for Refpiration^ myretalft 
its wonted pre ffnre^ 
Experiment i. 
We took a Moufe of an ordinary fize and having f not without fome diffi^ 
culty) conveyed him into an 0«^all Glafsjfitted with a fomewhat long and con- 
>^ fiderably broad neck, which we h id provided, that it might be wide enough 
toadmita Moufcin fpight of his ftruggling. We conveyed in after him a 
Mercurial Gage^in wh ch we had diligently obfervcd and marked the Station 
of the Vercury,and which was fo faftned to a Wire reaching to the bottom of 
the Oval Glafs, that the Gage,remainingin the neck^was not in danger to be 
broken by the motions of the Moufe in the Oval part .* The upper part of the 
long ne(k of the Glafi wa?, notwithftarding the wldcnefs of it, hermetically 
fe^icd by the help of a Lamp aad a pair of B eilows,that we might be fure, that 
