Boyle, Robert
,
New experiments physico-mechanicall, touching the spring of the air and its effects
,
1660
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ned and diligent
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Ricciolus,
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having pur
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poſely endeavoured to inveſtigate this
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proportion by meanes of a thin blad
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der, eſtimates the weight of the Air to
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that of the Water to be as one to ten
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thouſand, or thereabouts. </
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>And indeed I re
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member that having formerly, on a cer
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tain occaſion, weighed a large bladder full
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of Air, and found it when the Air was all
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ſqueeſed out, to have contained fourteen
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graines of Air. </
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>I found the ſame bladder
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afterwards fill'd with water to containe
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very neer 14. pound of that liquor: accor
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ding to which account, the proportion of
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Air to Water was almoſt as a graine to a
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pound, that is, as one to above 7600. To
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this we may adde, that on the other ſide,
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Galileo
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himſelfe uſing another, but an un
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accurate way too, defined the Air to be
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in weight to Water, but as one to 4. hun
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dred. </
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>But the way formerly propoſed of
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weighing the Air by an Æ
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olipile,
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ſeemes
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by great oddes more exact; and (as farre
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as we could gheſſe) ſeemed to agree well
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enough with the experiment made in our
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Receiver. </
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>Wherefore it will be beſt to
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truſt our Æ
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olipile
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in the enquiry we are a
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bout, and according to our obſervations
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the water it contained amounting to one </
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