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

List of thumbnails

< >
311
311 		312
312
313
313 		314
314
315
315 		316
316
317
317 		318
318
319
319 		320
320
< >
page |< < of 701 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <pb xlink:href="040/01/382.jpg" pagenum="362"/>
            <p type="margin">
              <s>
                <margin.target id="marg685"/>
              Peripatetick
                <emph type="italics"/>
                <lb/>
              loſophers condemn
                <lb/>
              the Study of
                <lb/>
              metry, and why.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>To tell you true, I do not very well know; perhaps,
                <lb/>
              becauſe I have not ſo much as learnt the reaſons that are by
                <emph type="italics"/>
                <lb/>
              my
                <emph.end type="italics"/>
              produced, of thoſe effects, I mean of thoſe ſtations,
                <lb/>
              dations, acceſſions, receſſions of the Planets; lengthenings and
                <lb/>
              ſhortnings of dayes, changes of ſeaſons, &c. </s>
              <s>But omitting the
                <lb/>
              conſequences that depend on the firſt ſuppoſitions, I find in the
                <lb/>
              ſuppoſitions themſelves no ſmall difficulties; which ſuppoſitions,
                <lb/>
              if once they be overthrown, they draw along with them the ruine
                <lb/>
              of the whole fabrick. </s>
              <s>Now foraſmuch as becauſe the whole
                <lb/>
              module of
                <emph type="italics"/>
              Copernicus
                <emph.end type="italics"/>
              ſeemeth in my opinion to be built upon
                <lb/>
              firm foundations, in that it relyeth upon the mobility of the earth,
                <lb/>
              if this ſhould happen to be diſproved, there would be no need of
                <lb/>
              farther diſpute. </s>
              <s>And to diſprove this, the Axiom of
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
                <lb/>
              is in my judgment moſt ſufficient, That of one ſimple body,
                <lb/>
              one ſole ſimple motion can be natural: but here in this caſe, to
                <lb/>
                <arrow.to.target n="marg686"/>
                <lb/>
              the Earth, a ſimple body, there are aſſigned 3. if not 4. motions,
                <lb/>
              and all very different from each other. </s>
              <s>For beſides the light
                <lb/>
              motion, as a grave body towards its centre, which cannot be
                <lb/>
              nied it, there is aſſigned to it a circular motion in a great circle
                <lb/>
              about the Sun in a year, and a vertiginous converſion about its
                <lb/>
              own centre in twenty four hours. </s>
              <s>And that in the next place
                <lb/>
              which is more exorbitant, & which happly for that reaſon you paſs
                <lb/>
              over in ſilence, there is aſcribed to it another revolution about
                <lb/>
              its own centre, contrary to the former of twenty four hours,
                <lb/>
              and which finiſheth its period in a year. </s>
              <s>In this my
                <lb/>
              ing apprehendeth a very great
                <lb/>
                <arrow.to.target n="marg687"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg686"/>
                <emph type="italics"/>
              Four ſeveral
                <lb/>
              motions aſſigned to
                <lb/>
              the Earth.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg687"/>
                <emph type="italics"/>
              The motion of
                <lb/>
              deſcent belongs not
                <lb/>
              to the terreſtrial
                <lb/>
              Globe, but to its
                <lb/>
              parts.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>As to the motion of deſcent, it hath already been
                <lb/>
              cluded not to belong to the Terreſtrial Globe which did never
                <lb/>
              move with any ſuch motion, nor never ſhall do; but is (if there be
                <lb/>
              ſuch a thing) that propenſion of its parts to reunite themſelves
                <lb/>
              to their whole. </s>
              <s>As, in the next place, to the Annual motion, </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg688"/>
                <lb/>
              and the Diurnal, theſe being both made towards one way, are
                <lb/>
              very compatible, in the ſame manner juſt as if we ſhould let a
                <lb/>
              Ball trundle downwards upon a declining ſuperficies, it would in
                <lb/>
              its deſcent along the ſame ſpontaneouſly revolve in it ſelf. </s>
              <s>As
                <lb/>
              to the third motion aſſigned it by
                <emph type="italics"/>
              Copernicus,
                <emph.end type="italics"/>
              namely about it
                <lb/>
              ſelf in a year, onely to keep its Axis inclined and directed
                <lb/>
              towards the ſame part of the Firmament, I will tell you a thing
                <lb/>
              worthy of great conſideration: namely
                <emph type="italics"/>
              ut tantum abeſt
                <emph.end type="italics"/>
              (although
                <lb/>
              it be made contrary to the other annual) it is ſo far from having
                <lb/>
              any repugnance or difficulty in it, that naturally and without any
                <lb/>
                <arrow.to.target n="marg689"/>
                <lb/>
              moving cauſe, it agreeth to any whatſoever ſuſpended and
                <lb/>
              ted body, which if it ſhall be carried round in the circumference
                <lb/>
              of a circle, immediate of it ſelf, it acquireth a converſion about
                <lb/>
              its own centre, contrary to that which carrieth it about, and of </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum