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

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              leſcope upon the ſunne; but alſo when a
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              large and well defin'd image of the ſunne
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              is by the ſame teleſcope brought into a
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              roome and caſt upon a ſheet of white pa­
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              per. </s>
              <s>But to inſiſt on this were to digreſs:
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              and therefore I will proceed to experi­
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              ments of another kind. </s>
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              <s>IT has been admir'd by very ingenious
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              Men, that if the exquiſitly poliſh'd
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              ſurfaces of two flat peeces of marble be ſo
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              congruous to each other that from their
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              mutuall application there will reſult an
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              immediate contact, they will ſtick ſo faſt
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              together, that he that lifts up the upper­
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              moſt, ſhall, if the undermoſt be not ex­
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              ceeding heavy, lift up that too, and ſuſ­
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              taine it aloft in the free aire. </s>
              <s>A proba­
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              ble cauſe of this ſo cloſe adheſion we have
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              elſewhere endeavour'd to deduce from the
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              unequall preſſure of the Air upon the un­
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              dermoſt ſtone; For the lower
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              ſuperficies
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              of that ſtone being freely expos'd to the
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              Air is preſſ'd upon by it, whereas the up­
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              permoſt ſurface, being contiguous to the
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              ſuperiour ſtone, is thereby defended from
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              the preſſure of the Air which conſequent­
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              ly preſſing the lower ſtone againſt the up-</s>
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