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

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              we put ſo much of a certain ponderous
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              Mercurial mixture (hapning to be then at
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              hand) that the mouth being ſtopt with a
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              little ſoft Wax, the Glaſs would juſt ſink
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              in Water and no more; this we let fall to
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              the bottom of a wide-mouth'd Cryſtal
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              Jar, fill'd with about half a pint of com­
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              mon Water, and into the ſame Veſſel we
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              ſunk the other Eſſence Glaſs unſtopp'd,
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              with as much Water in it as was more
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              then ſufficient to make it ſubſide. </s>
              <s>Both
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              theſe ſunk with their mouthes downward,
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              the former being about three quarters full
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              of Air, the latter containing in it a bub­
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              ble of Air that was gheſſ'd to be of the
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              bigneſs of half a Pea: This done, the
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              wide-mouth'd Glaſs was let down into
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              the Receiver, and the way of imploy­
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              ing the Engine was carefully made uſe
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              of. </s>
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              Experi­
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              ment
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              25.</s>
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              <s>The ſucceſs was, That having drawn
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              out a pretty quantity of Air, the bubbles
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              began to diſcloſe themſelves in the Wa­
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              ter, as in the former Experiments; and
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              though for a good while after the bubbles
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              aſcended in ſwarms from the lower parts
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              of the Water, and haſtily broke at the
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              top; yet we proſecuted the Experiment
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              ſo long without ſeeing any effect wrought </s>
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