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

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              of 28 pounds (each conſiſting of ſixteen
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              Ounces) being faſtned to one of the teeth
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              of the Sucker, drew it down ſlowly e­
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              nough; when the upper Orifice of the
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              Cylinder was left open, though by the
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              help of Oyl and Water, and by the fre­
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              quent moving the Sucker up and down
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              with the
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              Manubrium,
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              its motion in the
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              Cylinder had been before purpoſely faci­
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              litated. </s>
              <s>This done, the upper Orifice of
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              the Cylinder was very carefully and cloſe­
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              ly ſtopp'd, the Valve being likewiſe ſhut
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              with its wonted Stopple well oyl'd, af­
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              ter the Sucker had been again impell'd
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              up to the top of the Cylinder. </s>
              <s>Then to
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              the precedent twenty eight pound, we
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              added a hundred and twelve pounds more,
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              which forcing down the Sucker, though
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              but leiſurely, we took off the twenty
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              eight pound weight; and being unable to
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              procure juſt ſuch weights as we would
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              have had, we hung on, inſtead of it, one
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              of fourteen pound, but found that, with
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              the reſt, unable to carry down the Sucker.
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              </s>
              <s>And to ſatisfie our ſelves, and the Spe­
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              ctators, that it was the reſiſtance of the
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              ambient Air that hinder'd the deſcent of
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              ſo great a weight, after that we had try'd
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              that upon unſtopping the Valve, and </s>
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