Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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              <s>
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              circular which we preſuppoſe natural to the whole Terreſtrial
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              Globe, of which the ſtone is a part.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg311"/>
              Ariſtotle
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              teth that the Fire
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              moveth directly
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              upwards by
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              ture, and round
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              bout by
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              tion.
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              </s>
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              <s>SIMPL. </s>
              <s>I ſee no ſuch thing: for if the element of Fire
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              volve round together with the Air, it is a very eaſie, yea a neceſſary
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              thing, that a ſpark of fire which from the Earth mounts upwards,
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              in paſſing thorow the moving air, ſhould receive the ſame motion,
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              being a body ſo thin, light, and eaſie to be moved: but that a
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              very heavy ſtone, or a Canon bullet, that deſcendeth from on
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              high, and that is at liberty to move whither it will, ſhould ſuffer
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              it ſelf to be tranſported either by the air or any other thing, is
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              altogether incredible. </s>
              <s>Beſides that, we have the Experiment,
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              which is ſo proper to our purpoſe, of the ſtone let fall from the
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              round top of the Maſt of a ſhip, which when the ſhip lyeth ſtill,
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              falleth at the Partners of the Maſt; but when the ſhip ſaileth, falls
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              ſo far diſtant from that place, by how far the ſhip in the time of
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              the ſtones falling had run forward; which will not be a few
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              thoms, when the ſhips courſe is ſwift.</s>
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              <s>SALV. </s>
              <s>There is a great diſparity between the caſe of the Ship
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                <arrow.to.target n="marg312"/>
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              and that of the Earth, if the Terreſtrial Globe be ſuppoſed to have
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              a diurnal motion. </s>
              <s>For it is a thing very manifeſt, that the
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              tion of the Ship, as it is not natural to it, ſo the motion of all thoſe
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              things that are in it is accidental, whence it is no wonder that the
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              ſtone which was retained in the round top, being left at liberty,
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              deſcendeth downwards without any obligation to follow the
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              tion of the Ship. </s>
              <s>But the diurnal converſion is aſcribed to the
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              Terreſtrial Globe for its proper and natural motion, and
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              quently, it is ſo to all the parts of the ſaid Globe; and, as being
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              impreſs'd by nature, is indelible in them; and therefore that ſtone
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              that is on the top of the Tower hath an intrinſick inclination of
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              revolving about the Centre of its
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              Whole
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              in twenty four hours, and
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              this ſame natural inſtinct it exerciſeth eternally, be it placed in any
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              ſtate whatſoever. </s>
              <s>And to be aſſured of the truth of this, you
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              have no more to do but to alter an antiquated impreſſion made
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              in your mind; and to ſay, Like as in that I hitherto holding it to
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              be the property of the Terreſtrial Globe to reſt immoveable about
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              its Centre, did never doubt or queſtion but that all whatſoever
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              particles thereof do alſo naturally remain in the ſame ſtate of reſt:
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              So it is reaſon, in caſe the Terreſtrial Globe did move round by
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              natural inſtinct in twenty four hours, that the intrinſick and
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              ral inclination of all its parts ſhould alſo be, not to ſtand ſtill, but
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                <arrow.to.target n="marg313"/>
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              to follow the ſame revolution. </s>
              <s>And thus without running into
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              any inconvenience, one may conclude, that in regard the motion
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              conferred by the force of ^{*}Oars on the Ship, and by it on all the
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              things that are contained within her, is not natural but forreign, it
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              is very reaſonable that that ſtone, it being ſeparated from the ſhip, </s>
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          </chap>
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