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

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              <s>
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              it ſelfe when repleniſhed with Air, full
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              eleven graines. </s>
              <s>That is, the Air contain­
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              able within the cavity of the
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              Æolipile
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              a­
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              mounted to eleven graines and ſomewhat
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              more; I ſay ſomewhat more, becauſe of
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              the particles of the Air, that were not
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              driven by the fire out of the
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              Æolipile.
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              And by the way (if there be no miſtake
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              in the obſervations of the diligent
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              Mer­
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              ſennus
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              ) it may ſeeme ſtrange that it ſhould
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              ſo much differ from 2. or 3. of ours; in
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              none of which we could rarifie the Air in
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              our Æ
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              olipile
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              (though made red hot almoſt
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              all over, and ſo immediately plung'd into
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              cold water) to halfe that degree which he
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              mentions, namely to 70. times it's natu­
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              rall extent, unleſſe it were that the
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              Æo­
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              lipile
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              he imploy'd was able to ſuſtaine
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              a more vehement heat then ours (which
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              yet we kept in ſo great an one, that once
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              the ſoder melting, it fell aſunder into the
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              two Hemiſpheres it conſiſts of.) </s>
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              <s>The fore-mentioned way of weighing
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              the Air by the help of an
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              Æolipile,
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              ſeems
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              ſomewhat more exact then that which
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              Merſennus
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              uſed, In that in ours the
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              Æoli­
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              pile
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              was not weighed, till it was cold;
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              whereas in his, being weighed red hot, it </s>
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