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

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            <p type="main">
              <s>
                <pb xlink:href="040/01/327.jpg" pagenum="307"/>
              times farther from us at one time, than at another; and alſo
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              eth to be alwayes of an equal bigneſs, although it ought to ſhew
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              forty times bigger when neareſt to us, than when fartheſt off.</s>
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            <p type="main">
              <s>SAGR. </s>
              <s>But in
                <emph type="italics"/>
              Jupiter, Saturn
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              and
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              Mercury,
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              I believe that
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              the differences of their apparent magnitudes, ſhould ſeem
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              ally to anſwer to their different diſtances.</s>
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            <p type="main">
              <s>SALV. </s>
              <s>In the two Superiour ones, I have made preciſe
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              ſervations yearly for this twenty two years laſt paſt: In
                <emph type="italics"/>
              Mercury
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg563"/>
                <lb/>
              there can be no obſervation of moment made, by reaſon it
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              fers not it ſelf to be ſeen, ſave onely in its greateſt digrſſieons
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              from the Sun, in which its diſtances from the earth are inſenſibly
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              unequal, and thoſe differences conſequently not to be obſerved;
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              as alſo its mutations of figures which muſt abſolutely happen in
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              it, as in
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              Venus.
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              And if we do ſee it, it muſt of neceſſity appear
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              in form of a Semicircle, as
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              Venus
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              likewiſe doth in her greateſt
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              digreſſions; but its
                <emph type="italics"/>
              diſcus
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              is ſo very ſmall, and its ſplendor ſo
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              very great, by reaſon of its vicinity to the Sun, that the virtue
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              of the Teleſcope doth not ſuffice to clip its treſſes or adventitious
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              rayes, ſo as to make them appear ſhaved round about. </s>
              <s>It
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                <arrow.to.target n="marg564"/>
                <lb/>
              mains, that we remove that which ſeemed a great inconvenience
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              in the motion of the Earth, namely that all the Planets moving
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              about the Sun, it alone, not ſolitary as the reſt, but in company
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              with the Moon, and the whole Elementary Sphear, ſhould move
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              round about the Sun in a year; and that the ſaid Moon withal
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              ſhould move every moneth about the earth. </s>
              <s>Here it is neceſſary
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              once again to exclaim and extol the admirable perſpicacity of
                <emph type="italics"/>
                <lb/>
              pernicus,
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              and withal to condole his misfortune, in that he is not
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              now alive in our dayes, when for removing of the ſeeming
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              ſurdity of the Earth and Moons motion in conſort we ſee
                <emph type="italics"/>
                <lb/>
              ter,
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              as if it were another Earth, not in conſort with the Moon,
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              but accompanied by four Moons to rovolve about the Sun in 12.
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              years together, with what ever things the Orbs of the four
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              cæan Stars can contain within them.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg563"/>
              Mercury
                <emph type="italics"/>
                <lb/>
              teth not of clear
                <lb/>
              obſervations.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg564"/>
                <emph type="italics"/>
              The difficulties
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              removed that ariſe
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              from the Earths
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              moving about the
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              Sun, not ſolitarily,
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              but in conſort with
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              the Moon.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>Why do you call the four jovial Planets, Moons?</s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>Such they would ſeem to be to one that ſtanding in
                <lb/>
                <arrow.to.target n="marg565"/>
                <lb/>
                <emph type="italics"/>
              Jupiter
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              ſhould behold them; for they are of themſelves dark, and
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              receive their light from the Sun, which is manifeſt from their
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              ing eclipſed, when they enter into the cone of
                <emph type="italics"/>
              Jupiters
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              ſhadow:
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              and becauſe onely thoſe their Hemiſpheres, that look towards the
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              Sun are illuminated, to us that are without their Orbs, and
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              er to the Sun, they ſeem alwayes
                <emph type="italics"/>
              lucid,
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              but to one that ſhould be
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              in
                <emph type="italics"/>
              Jupiter,
                <emph.end type="italics"/>
              they would ſhew all illuminated, at ſuch time as they
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              were in the upper parts of their circles; but in the parts
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              our, that is between
                <emph type="italics"/>
              Jupiter
                <emph.end type="italics"/>
              and the Sun, they would from
                <emph type="italics"/>
                <lb/>
              piter
                <emph.end type="italics"/>
              be obſerved to be horned; and in a word they would, to </s>
            </p>
          </chap>
        </body>
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    </archimedes>
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