Galilei, Galileo, The systems of the world, 1661

Table of figures

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              <s>
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              courſe; and yet I had ſomething in my mind that I intended to
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              have ſpoken upon that ſubject.</s>
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            <p type="margin">
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              A pleaſant
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              ampleaeclaring the
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              invalidity of ſome
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              Phyloſophical
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              gumentations.
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              <s>SALV. </s>
              <s>We were about to demonſtrate that third motion
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              ſcribed by
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              Copernicus
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              to the Earth to be no motion but a
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              ſcence and maintaining of it ſelf immutably directed with its
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              terminate parts towards the ſame & determinate parts of the
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              verſe, that is a perpetual conſervation of the Axis of its diurnal
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              revolution parallel to it ſelf, and looking towards ſuch and ſuch
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              fixed ſtars; which moſt conſtant poſition we ſaid did naturally
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              agree with every librated body ſuſpended in a fluid and yielding
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                <emph type="italics"/>
              medium,
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              which although carried about, yet did it not change
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              rectionin reſpect of things external, but onely ſeemed to revolve in
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              its ſelf, in reſpect of that which carryed it round, and to the
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              veſſel in which it was tranſported. </s>
              <s>And then we added to this
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              ſimple and natural accident the magnetick virtue, whereby the
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              ſelf Terreſtrial Globe might ſo much the more conſtantly keep it
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              immutable, -----</s>
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              <s>SAGR. </s>
              <s>Now I remember the whole buſineſſe; and that which
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              then came into my minde, & which I would have intimated, was a
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              certain conſideration touching the ſcruple and objection of
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              plicius,
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              which he propounded againſt the mobility of the Earth,
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              taken from the multiplicity of motions, impoſſible to be aſſigned
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              to a ſimple body, of which but one ſole and ſimple motion,
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              cording to the doctrine of
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              Ariſtotle,
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              can be natural; and that
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              which I would have propoſed to conſideration, was the Magnet,
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              to which we manifeſtly ſee three motions naturally to agree:
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              one towards the centre of the Earth, as a
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              Grave
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              ; the ſecond is
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              the circular Horizontal Motion, whereby it reſtores and
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              ſerves its Axis towards determinate parts of the Univerſe; and
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              the third is this, newly diſcovered by
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              Gilbert,
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              of inclining its
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              Axis, being in the plane of a Meridian towards the ſurface of the
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              Earth, and this more and leſſe, according as it ſhall be diſtant
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              from the Equinoctial, under which it is parallel to the Axis of
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              the Earth. </s>
              <s>Beſides theſe three, it is not perhaps improbable,
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              but that it may have a fourth, of revolving upon its own Axis, in
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              caſe it were librated and ſuſpended in the air or other fluid and
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              yielding
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              Medium,
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              ſo that all external and accidental impediments
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              were removed, and this opinion
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              Gilbert
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              himſelf ſeemeth alſo to
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              applaud. </s>
              <s>So that,
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              Simplicius,
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              you ſee how tottering the Axiome
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              of
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              Ariſtotle
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              is.</s>
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            <p type="margin">
              <s>
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              The ſeveral
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              tural motions of
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              the Magnet.
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              <s>SIMP. </s>
              <s>This doth uot only not make againſt the Maxime, but
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              not ſo much as look towards it: for that he ſpeaketh of a fimple
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              body, and of that which may naturally conſiſt therewith; but
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              you propoſe that which befalleth a mixt body; nor do you tell
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              us of any thing that is new to the doctrine of
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              Ariſtotle,
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              for that </s>
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