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

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              <s>
                <pb xlink:href="040/01/260.jpg" pagenum="242"/>
              caſe, which
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              Copernicus
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              alledgeth, that by reaſon this motion is
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              natural to the Earth and not violent, it worketh contrary effects
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              to violent motions; and that thoſe things diſſolve and cannot
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              long ſubſiſt, to which impulſe is conferred, but thoſe ſo made
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              by nature do continue in their perfect diſpoſure; this anſwer
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              ficeth not, I ſay, for it is overthrown by that of ours. </s>
              <s>For the
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              nimal is a natural body, and not made by art, and its motion is
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              natural, deriving it ſelf from the ſoul, that is, from an intrinſick
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              principle; and that motion is violent, whoſe beginning is
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              out, and on which the thing moved conferreth nothing;
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              ever, if the animal continueth its motion any long time, it grows
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              weary, and alſo dyeth, if it obſtinately ſtrive to perſiſt therein.
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              </s>
              <s>You ſee then that in nature we meet on all ſides with notions
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              trary to the
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              Copernican Hypotheſis,
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              and none in favour of it. </s>
              <s>And
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              for that I have nothing more wherein to take the part of this
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              ponent, hear what he produceth againſt
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              Keplerus
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              (with whom
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              he diſputeth) upon that argument, which the ſaid
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              Kepler
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              bringeth
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              againſt thoſe who think it an inconvenient, nay impoſſible thing,
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              to augment the Starry Sphere immenſely, as the
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              Copernican
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              potheſis requireth.
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              Kepler
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              therefore inſtanceth, ſaying:
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              us ect, accidens præter modulum ſubjecti intendere, quàm ſub-
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                <lb/>
                <arrow.to.target n="marg489"/>
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                <emph type="italics"/>
              jectum ſine accidente augere. </s>
              <s>Copernicus ergo veriſimilius facit,
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              qui auget Orbem Stellarum fixarum abſque motu, quam Ptolomæus,
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              qui auget motum fixarum immenſà velocitate.
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              [Which makes this
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              Engliſh.] Its harder to ſtretch the accident beyond the model of the
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              ſubject than to augment the ſubject without the accident.
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              Coperni-
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              hath more probability on his ſide, who encreaſeth the Orb of the
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              fixed Stars without motion, than
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              Ptolomy
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              who augmenteth the
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              motion of the fixed Stars to an immenſe degree of velocity.
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                <arrow.to.target n="marg490"/>
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              Which objection the Author anſwereth, wondering how much
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                <emph type="italics"/>
              Kepler
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              deceived himſelf, in ſaying, that in the Ptolomaick
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              ſis the motion encreaſeth beyond the model of the ſubject, for in
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              his judgment it doth not encreaſe, ſave onely in conformity to the
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              model, and that according to its encreaſement, the velocity of
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                <arrow.to.target n="marg491"/>
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              the motion is augmented. </s>
              <s>Which he proveth by ſuppoſing a
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              chine to be framed, that maketh one revolution in twenty four
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              hours, which motion ſhall be called moſt ſlow; afterwards
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              poſing its ſemidiameter to be prolonged, as far as to the diſtance
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              of the Sun, its extreme will equal the velocity of the Sun; and
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              it being cantinued out unto the Starry Sphere, it will equal the
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              velocity of the fixed Stars, though in the circumferrnce of the
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              machine it be very ſlow. </s>
              <s>Now applying this conſideration of the
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              machine to the Starry Sphere, let us imagine any point in its
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              midiameter, as neer to the centre as is the ſemidiameter of the
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              chine; the ſame motion that in the Starry Sphere is exceeding </s>
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          </chap>
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