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

Table of figures

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              Spring-Tides. </s>
              <s>For he ſagaciouſly and
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              plauſibly conjectur'd that ſuch obſervati­
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              ons accurately made, would diſcover the
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              truth or erroneouſneſs of the
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              Carteſian
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              Hypotheſis
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              concerning the Ebbing and
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              Flowing of the Sea: which
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              Des Cartes
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              aſcribes to the greater preſſure made upon
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              the Air by the Moon, and the Intercur­
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              rent Ethereal Subſtance at certain times
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              (of the Day, and of the Lunary Moneth)
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              then at others. </s>
              <s>But in regard we found
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              the Quick-ſilver in the Tube to move up
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              and down ſo uncertainly, by reaſon, as it
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              ſeems, of accidental mutation in the Air;
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              I ſomewhat doubt whether we ſhall finde
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              the Altitude of the Quick-ſilver to vary
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              as regularly as the Experiment is ingeni­
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              ouſly propoſ'd. </s>
              <s>The ſucceſs we ſhall (God
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              permitting us to make tryal of it) acquaint
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              Your Lordſhip with; and in the mean
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              time take notice, that when we had occa­
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              ſion to take the Tube out of the Frame
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              (after it had ſtaid there part of
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              November
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              and part of
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              December
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              ) a good Fire being
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              then in the room, becauſe it was a Snowy
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              day, we found the Quick-ſilver in the
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              Tube to be above the upper ſurface of
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              the ſubjacent Mercury 29 Inches three
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              quarters. </s>
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