Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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              diffuſe themſelves about the Terreſtial
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              Globe; whereby it comes to paſs, that
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              they muſt as well preſs the contiguous
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              Corpuſcles of Air that on either ſide op­
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              poſe their Dilatation, as they muſt preſs
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              upon the ſurface of the Earth, and, as it
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              were recoyling thence, endeavor to thruſt
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              away thoſe upper particles of Air that
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              lean upon them. </s>
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              <s>And as for the eaſie yielding of the Air
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              to the Bodies that move in it, if we con­
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              ſider that the Corpuſcles whereof it con­
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              ſiſts, though of a ſpringy nature, are yet
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              ſo very ſmall, as to make up (which 'tis
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              manifeſt they doe) a fluid Body, it will
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              not be difficult to conceive, that in the
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              Air, as in other Bodies that are fluid, the
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              little Bodies it conſiſts of are in an almoſt
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              reſtleſs motion, whereby they become
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              (as we have more fully diſcourſed in ano­
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              ther Treatiſe) very much diſpoſed to
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              yield to other Bodies, or eaſie to be diſ­
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              plac'd by them, and that the ſame Cor­
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              puſcles are likewiſe ſo variouſly mov'd, as
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              they are intire Corpuſcles, that if ſome
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              ſtrive to puſh a Body plac'd among them
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              towards the right hand (for inſtance)
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              others, whoſe motion has an oppoſite de­
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              termination, as ſtrongly thruſt the ſame </s>
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