Galilei, Galileo, The systems of the world, 1661

Page concordance

< >
Scan Original
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
< >
page |< < of 948 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="065/01/047.jpg" pagenum="41"/>
              ment that they generate and diſſolve; for if without generating
                <lb/>
              or corrrupting, they ſhould appear there by onely local motion,
                <lb/>
              they would all be ſeen to enter, and paſs out by the extreme
                <lb/>
                <arrow.to.target n="marg116"/>
                <lb/>
              cumference. </s>
              <s>The other obſervation to ſuch as are not ſituate in
                <lb/>
              the loweſt degree of ignorance in Perſpective, by the mutation
                <lb/>
              of the appearing figures, and by the apparent mutations of the
                <lb/>
              velocity of motion is neceſſarily concluding, that the ſpots are
                <lb/>
              contiguous to the body of the Sun, and that touching its
                <lb/>
              cies, they move either with it or upon it, and that they in no wiſe
                <lb/>
              move in circles remote from the ſame. </s>
              <s>The motion proves
                <lb/>
                <arrow.to.target n="marg117"/>
                <lb/>
              it, which towards the circumference of the Solar Circle,
                <lb/>
              appeareth very ſlow, and towards the midſt, more ſwift; the
                <lb/>
              gures of the ſpots confirmeth it, which towards the circumference
                <lb/>
                <arrow.to.target n="marg118"/>
                <lb/>
              appear exceeding narrow in compariſon of that which they ſeem
                <lb/>
              to be in the parts nearer the middle; and this becauſe in the
                <lb/>
              midſt they are ſeen in their full luſter, and as they truly be; and
                <lb/>
              towards the circumference by reaſon of the convexity of the
                <lb/>
              bous ſuperficies, they ſeem more compreſſ'd: And both theſe
                <lb/>
              diminutions of figure and motion, to ſuch as know how to obſerve
                <lb/>
              and calculate them exactly, preciſely anſwer to that which ſhould
                <lb/>
              appear, the ſpots being contiguous to the Sun, and differ
                <lb/>
              cileably from a motion in circles remote, though but for ſmal
                <lb/>
              intervalls from the body of the Sun; as hath been diffuſely
                <lb/>
                <arrow.to.target n="marg119"/>
                <lb/>
              monſtrated by our ^{*} Friend, in his Letters about the Solar ſpots,
                <lb/>
              to
                <emph type="italics"/>
              Marcus Velſerus.
                <emph.end type="italics"/>
              It may be gathered from the ſame
                <lb/>
              tion of figure, that none of them are ſtars, or other bodies of
                <lb/>
              ſpherical figure; for that amongſt all figures the ſphere never
                <lb/>
              appeareth compreſſed, nor can ever be repreſented but onely
                <lb/>
              fectly round; and thus in caſe any particular ſpot were a round
                <lb/>
              body, as all the ſtars are held to be, the ſaid roundneſs would as
                <lb/>
              well appear in the midſt of the Solar ring, as when the ſpot is near
                <lb/>
              the extreme: whereas, its ſo great compreſſion, and ſhewing its
                <lb/>
              ſelf ſo ſmall towards the extreme, and contrariwiſe, ſpatious and
                <lb/>
              large towards the middle, aſſureth us, that theſe ſpots are flat
                <lb/>
                <arrow.to.target n="marg120"/>
                <lb/>
              plates of ſmall thickneſs or depth, in compariſon of their length
                <lb/>
              and breadth. </s>
              <s>Laſtly, whereas you ſay that the ſpots after their
                <lb/>
              determinate periods are obſerved to return to their former aſpect,
                <lb/>
              believe it not,
                <emph type="italics"/>
              Simplicius,
                <emph.end type="italics"/>
              for he that told you ſo, will deceive
                <lb/>
              you; and that I ſpeak the truth, you may obſerve them to be hid
                <lb/>
              in the face of the Sun far from the circumference; nor hath your
                <lb/>
              Obſervator told you a word of that compreſſion, which
                <lb/>
              rily argueth them to be contiguous to the Sun. </s>
              <s>That which he
                <lb/>
              tells you of the return of the ſaid ſpots, is nothing elſe but what
                <lb/>
              is read in the forementioned Letters, namely, that ſome of them
                <lb/>
              may ſometimes ſo happen that are of ſo long a duration, that </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum