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

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              Bubble of Glaſs) ſets down his thoughts con­
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              cerning the ſtrange exuperancy of ſtrength
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              in Air, agitated by heat, above what the
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              ſame has unagitated,
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              283 &c.
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              And then pro­
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              ceeds to the examination of the weight of the
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              Air by an
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              Æolipile,
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              and compares the reſult
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              thereof, with that of
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              Merſennus, 286.
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              The
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              Opinions and Experiments of divers Au­
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              thors, and ſome of his own, touching the
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              proportion of weight betwixt Water and Air,
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              are compar'd and examin'd by the Author,
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              288.
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              The reſult thereof,
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              290. Merſennus
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              his obſervation reconcil'd, with that of the
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              Author; and the proportion between the gra­
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              vity of Water and Air about
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              London, 291
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              &c.
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              After the recital of the Opinions of ſe­
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              veral Writers, touching the proportion of
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              gravity between Water and Quick-ſilver,
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              the Author ſets down his own tryals, made
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              ſeveral ways, together with his concluſion
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              therefrom,
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              293 &c.
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              The uſe he makes of this
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              inquiry for the gheſsing at the height of the
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              Atmoſphere,
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              297.
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              What other Experiments
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              are requiſite to the determination thereof.
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              299 &c. </s>
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              The
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              37
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              th
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              E
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              xperiment, touching the ſtrange
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              and odde
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              Phænomenon,
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              of the ſudden flaſh­
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              es of light in the cavity of the Receiver; the
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              ſeveral circumſtances and difficulties of it,
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              </s>
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