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er Attratiion, are not feparated without. a<br />
fironger Heat, or perhnpS not without Fermentation.<br />
And thele lait are the Bodies which<br />
Chymifls calr fix’& and being rarified by Fermcntation,<br />
become true permanent Air : thofe<br />
Particles receding from one another with the<br />
giea teit Force, and being moit: dirhcult~y br,ought<br />
together, which upon ContaCt cohere mo.i&<br />
itrongly. And becaufe the Particles of permanent<br />
Air are grorer,. and arifc from denfersub-<br />
Oances than thofe of Vapours, thence it is that<br />
true Air is more pond’erous thanVapour, and:<br />
that a moifi Atmofphere is lighter than a dry<br />
one, quantity for quantity.- From the fame sepelling<br />
Power it feems to bc that Flies walk<br />
upon the Water without wetting their Feet;.<br />
,and. that the Ckj,e&-glaf??s of long ‘I’elefcopes<br />
. lie upon one another without, touching; and<br />
that dry Powders are difficultly made to touch<br />
6ne another fo a5 to ftiek together ,. unlefs by<br />
melting them, or wetting them with Water,><br />
tihich by exhaling may bring them together ;.<br />
and that two polifh’d l&Iarbles, which by immediate<br />
Conta& ihck together, are dii-Xicultly.<br />
brought fo clofe together as to itick,<br />
And thus Nature. ~7111 be very conformable.<br />
ito her felf and very GInpIe, performing all the<br />
great Motions of the heavenly Bodies by the<br />
.&xraAion of Gravity which. intercedes thofe<br />
Bodies, and almofi all the fmall ones, of their<br />
Particles by fame other attratiive and repelling<br />
Powers which intercede the Particles. The<br />
+4Fif<br />
.._,<br />
isw-tid is a pafive rinciple by which Hodies,
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