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

List of thumbnails

< >
331
331 		332
332
333
333 		334
334
335
335 		336
336
337
337 		338
338
339
339 		340
340
< >
page |< < of 701 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="040/01/331.jpg" pagenum="311"/>
              the right line B B P. </s>
              <s>Next ſuppoſe the Earth to be moved from
                <lb/>
              B to C, and
                <emph type="italics"/>
              Jupiter
                <emph.end type="italics"/>
              from B to C, in the ſame time;
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
                <lb/>
              ſhall appear to have paſſed in the Zodiack to Q, and to have
                <lb/>
              moved ſtraight forwards, according to the order of the ſignes
                <lb/>
              P
                <expan abbr="q.">que</expan>
              In the next place, the Earth paſſing to D, and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
                <lb/>
              to D, it ſhall be ſeen in the Zodiack in R, and from E,
                <emph type="italics"/>
                <lb/>
              ter
                <emph.end type="italics"/>
              being come to E; will appear in the Zodiack in S, having
                <lb/>
              all this while moved right forwards. </s>
              <s>But the Earth afterwards
                <lb/>
              beginning to interpoſe more directly between
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              and the
                <lb/>
              Sun, ſhe being come to F, and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              to F, he will appear in
                <lb/>
              T, to have already begun to return apparently back again
                <lb/>
              der the Zodiack, and in that time that the Earth ſhall have
                <lb/>
              ed the arch E F,
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              ſhall have entertained himſelf between
                <lb/>
              the points S T, and ſhall have appeared to us almoſt
                <lb/>
              leſſe and ſtationary. </s>
              <s>The Earth being afterwards come to G,
                <lb/>
              and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              to G, in oppoſition to the Sun, it ſhall be viſible in
                <lb/>
              the Zodiack at V, and much returned backwards by all the arch
                <lb/>
              of the Zodiack T V; howbeit that all the way purſuing its even
                <lb/>
              courſe it hath really gone forwards not onely in its own circle,
                <lb/>
              but in the Zodiack alſo in reſpect to the centre of the ſaid
                <lb/>
              ack, and to the Sun placed in the ſame. </s>
              <s>The Earth and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
                <lb/>
              again continuing their motions, when the Earth is come to H,
                <lb/>
              and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              to H, it ſhall ſeem very much gone backward in the
                <lb/>
              Zodiack by all the arch V X. </s>
              <s>The Earth being come to I, and
                <lb/>
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              to I, it ſhall be apparently moved in the Zodiack by the
                <lb/>
              tle ſpace X Y, and there it will ſeem ſtationary. </s>
              <s>When
                <lb/>
              wards the Earth ſhall be come to K, and
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              to K; in the
                <lb/>
              Zodiack he ſhall have paſſed the arch Y N in a direct motion;
                <lb/>
              and the Earth purſuing its courſe to L, ſhall ſee
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              in L, in
                <lb/>
              the point Z. </s>
              <s>And laſtly
                <emph type="italics"/>
              Iupiter
                <emph.end type="italics"/>
              in M ſhall be ſeen from the Earth
                <lb/>
              M, to have paſſed to A, with a motion ſtill right forwards; and
                <lb/>
              its whole apparent retrogadation in the Zodiack ſhall anſwer to
                <lb/>
              the arch S Y, made by
                <emph type="italics"/>
              Iupiter,
                <emph.end type="italics"/>
              whilſt that he in his own circle
                <lb/>
              paſſeth the arch E I, and the Earth in hers the arch E I. </s>
              <s>And
                <lb/>
                <arrow.to.target n="marg573"/>
                <lb/>
              this which hath been ſaid, is intended of
                <emph type="italics"/>
              Saturn
                <emph.end type="italics"/>
              and of
                <emph type="italics"/>
              Mars
                <emph.end type="italics"/>
                <lb/>
              alſo; and in
                <emph type="italics"/>
              Saturn
                <emph.end type="italics"/>
              thoſe retrogradations are ſomewhat more
                <lb/>
              frequent than in
                <emph type="italics"/>
              Jupiter,
                <emph.end type="italics"/>
              by reaſon that its motion is a little
                <lb/>
              ſlower than that of
                <emph type="italics"/>
              Jupiter,
                <emph.end type="italics"/>
              ſo that the Earth overtaketh it
                <lb/>
              it in a ſhorter ſpace of time; in
                <emph type="italics"/>
              Mars
                <emph.end type="italics"/>
              again they are more
                <lb/>
              rare, for that its motion is more ſwift than that of
                <emph type="italics"/>
              Jupiter.
                <emph.end type="italics"/>
                <lb/>
              Whereupon the Earth conſumeth more time in recovering it. </s>
              <s>Next
                <lb/>
              as to
                <emph type="italics"/>
              Venus
                <emph.end type="italics"/>
              and
                <emph type="italics"/>
              Mercury,
                <emph.end type="italics"/>
              whoſe Circles are comprehended by that
                <lb/>
                <arrow.to.target n="marg574"/>
                <lb/>
              of the Earth, their ſtations and regreſſions appear to be
                <lb/>
              oned, not by their motions that really are ſuch, but by the anual
                <lb/>
              motion of the ſaid Earth, as
                <emph type="italics"/>
              Copernicus
                <emph.end type="italics"/>
              exellently demonſtrateth, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum