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

List of thumbnails

< >
231
231 		232
232
233
233 		234
234
235
235 		236
236
237
237 		238
238
239
239 		240
240
< >
page |< < of 701 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="040/01/239.jpg" pagenum="221"/>
              ſtence before the common centre of gravity: ſo that it is not one </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg421"/>
                <lb/>
              centre alone, which is no other than indiviſible point, and therefore
                <lb/>
              of no efficacie, that can attract unto it grave matters; but that thoſe
                <lb/>
              matters conſpiring naturally to unite, form to themſelves a
                <lb/>
              mon centre, which is that about which parts of equal moment
                <lb/>
              conſiſt: ſo that I hold, that if the great aggregate of grave
                <lb/>
                <arrow.to.target n="marg422"/>
                <lb/>
              dies were gathered all into any one place, the ſmall parts that were
                <lb/>
              ſeparated from their whole, would follow the ſame, and if they
                <lb/>
              were not hindered, would penetrate wherever they ſhould find
                <lb/>
              parts leſs grave than themſelves: but coming where they ſhould
                <lb/>
              meet with matters more grave, they would deſcend no farther.
                <lb/>
              </s>
              <s>And therefore I hold, that in the Cave full of air, the whole Vault
                <lb/>
              would preſs, and violently reſt it ſelf onely upon that air, in caſe
                <lb/>
              its hardneſs could not be overcome and broken by its gravity; but
                <lb/>
              looſe ſtones, I believe, would deſcend to the centre, and not ſwim
                <lb/>
              above in the air: nor may it be ſaid, that they move not to their
                <lb/>
              whole, though they move whither all the parts of the whole
                <lb/>
              would transfer themſelves, if all impediments were removed.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg421"/>
                <emph type="italics"/>
              Things grave are
                <lb/>
              before the centre of
                <lb/>
              gravity.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg422"/>
                <emph type="italics"/>
              The great maſs
                <lb/>
              of grave bodies
                <lb/>
              ing transferred out
                <lb/>
              of their place, the
                <lb/>
              ſeparated parts
                <lb/>
              would follow that
                <lb/>
              maß.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>That which remaineth, is a certain Errour which he
                <lb/>
              ſerveth in a Diſciple of
                <emph type="italics"/>
              Copernicus,
                <emph.end type="italics"/>
              who making the Earth to
                <lb/>
              move with an annual motion, and a diurnal, in the ſame manner
                <lb/>
              as the Cart-wheel moveth upon the circle of the Earth, and in it
                <lb/>
              ſelf, did conſtitute the Terreſtrial Globe too great, or the great
                <lb/>
              Orb too little; for that 365 revolutions of the Æquinoctial, are
                <lb/>
              leſs by far than the circumference of the great Orb.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>Take notice that you miſtake, and tell us the direct
                <lb/>
              contrary to what muſt needs be written in that Book; for you
                <lb/>
              ſhould ſay, that that ſame
                <emph type="italics"/>
              Copernican
                <emph.end type="italics"/>
              Author did conſtitute the
                <lb/>
              Terreſtrial Globe too little, and the great Orb too big; and not
                <lb/>
              the Terreſtrial Globe too big, and the annual too little.</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>The miſtake is not mine; ſee here the words of the
                <lb/>
              Book.
                <emph type="italics"/>
              Non videt, quòd vel circulum annuum æquo minorem, vel
                <lb/>
              orbem terreum juſto multò fabricet majorem.
                <emph.end type="italics"/>
              (In Engliſh thus:)
                <lb/>
              He ſeeth not, that he either maketh the annual circle equal to the
                <lb/>
              leſs, or the Terreſtrial Orb much too big.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>I cannot tell whether the firſt Author erred or no, ſince
                <lb/>
              the Author of this Tractate doth not name him; but the error of
                <lb/>
              this Book is certain and unpardonable, whether that follower of
                <lb/>
                <emph type="italics"/>
              Copernicus
                <emph.end type="italics"/>
              erred or not erred; for that your Author paſſeth by ſo
                <lb/>
              material an error, without either detecting or correcting it. </s>
              <s>But
                <lb/>
              let him be forgiven this fault, as an error rather of inadvertencie,
                <lb/>
              than of any thing elſe: Farthermore, were it not, that I am
                <lb/>
              ready wearied and tired with talking and ſpending ſo mnch time
                <lb/>
              with very little profit, in theſe frivolous janglings and
                <lb/>
              tions, I could ſhew, that it is not impoſſible for a circle, though </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum