Boyle, Robert - New experiments physico-mechanicall, touching the spring of the air and its effects

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1diffuſe themſelves about the Terreſtial
Globe; whereby it comes to paſs, that
they muſt as well preſs the contiguous
Corpuſcles of Air that on either ſide op
poſe their Dilatation, as they muſt preſs
upon the ſurface of the Earth, and, as it
were recoyling thence, endeavor to thruſt
away thoſe upper particles of Air that
lean upon them.

And as for the eaſie yielding of the Air
to the Bodies that move in it, if we con
ſider that the Corpuſcles whereof it con
ſiſts, though of a ſpringy nature, are yet
ſo very ſmall, as to make up (which 'tis
manifeſt they doe) a fluid Body, it will
not be difficult to conceive, that in the
Air, as in other Bodies that are fluid, the
little Bodies it conſiſts of are in an almoſt
reſtleſs motion, whereby they become
(as we have more fully diſcourſed in ano

ther Treatiſe) very much diſpoſed to
yield to other Bodies, or eaſie to be diſ
plac'd by them, and that the ſame Cor
puſcles are likewiſe ſo variouſly mov'd, as
they are intire Corpuſcles, that if ſome
ſtrive to puſh a Body plac'd among them
towards the right hand (for inſtance)
others, whoſe motion has an oppoſite de
termination, as ſtrongly thruſt the ſame

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