Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667
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              <s>
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              Orb. </s>
              <s>And becauſe the diſtance of the Sun from the Earth,
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              tains by common conſent 1208. Semidiameters of the ſaid Earth,
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              and the diſtance of the fixed Stars (as hath been ſaid) 2160.
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              Semediameters of the grand Orb, therefore the Semediameter of
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              the Earth is much greater (that is almoſt double) in compariſon
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              of the grand Orb, than the Semediameter of the grand Orb, in
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              relation to the diſtance of the Starry Sphære; and therefore the
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              variation of aſpect in the fixed Stars, cauſed by the Diameter of
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              the grand Orb, can be but little more obſervable, than that which
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              is obſerved in the Sun, occaſioned by the Semediameter of the
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              Earth.</s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The diſtance of
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              the Sun, containeth
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              1208
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              Semid. </s>
              <s>of the
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              Earth.
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              </s>
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              <s>
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              * The Diameter
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              of the Sun, half a
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              degree.</s>
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            <p type="margin">
              <s>
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                <emph type="italics"/>
              The Diameter
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              of a fixed Star, of
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              the firſt
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              tude, and of one of
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              the ſixth.
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              </s>
            </p>
            <p type="margin">
              <s>
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                <emph type="italics"/>
              The apparent
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              Diameter of the
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              Sun, how much it
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              is bigger than that
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              of a fixed ſtar.
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              </s>
            </p>
            <p type="margin">
              <s>
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              The diſtance of
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              a fixed ſtar of the
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              ſixth magnitude,
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              how much it is, the
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              ſtar being ſuppoſed
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              to be equal to the
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              Sun.
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              </s>
            </p>
            <p type="margin">
              <s>
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                <emph type="italics"/>
              In the fixed ſtars
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              the diverſitie of
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              ſpect, cauſed by
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              the grand Orb, is
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              little more then
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              that cauſed by the
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              Earth in the Snn.
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              </s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>This is a great fall for the firſt ſtep.</s>
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            <p type="main">
              <s>SALV. </s>
              <s>It is doubtleſſe an errour; for a fixed Star of the ſixth
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              magnitude, which by the computation of this Authour, ought,
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              for the upholding the propoſition of
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              Copernicus,
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              to be as big as
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              the whole grand Orb, onely by ſuppoſing it equal to the Sun,
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              which Sun is leſſe by far, than the hundred and ſix milionth part
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              of the ſaid grand Orb, maketh the ſtarry Sphære ſo great and high
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              as ſufficeth to overthrow the inſtance brought againſt the ſaid
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              pernicus.
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              </s>
            </p>
            <p type="margin">
              <s>
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                <emph type="italics"/>
              A ſtar of the
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              ſixth magnitude,
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              ſuppoſed by
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              Tycho
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              and the Authour
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              of the Book of
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              cluſions, an
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              dred and ſix
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              ons of times bigger
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              than needs.
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              </s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>Favour me with this computation.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>The ſupputation is eaſie and ſhort. </s>
              <s>The Diameter of
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              the Sun, is eleven ſemediameters of the Earth, and the Diameter
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              of the grand Orb, contains 2416. of thoſe ſame ſemediameters,
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              by the aſcent of both parties; ſo that the Diameter of the ſaid
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              Orb, contains the Suns Diameter 220. times very near. </s>
              <s>And
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              becauſe the Spheres are to one another, as the Cubes of their
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              ameters, let us make the Cube of 220. which is 106480000. and
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              we ſhall have the grand Orb, an hundred and ſix millions, four
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              hundred and eighty thouſand times bigger than the Sun, to which
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              grand Orb, a ſtar of the fixth magnitude, ought to be equal,
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              cording to the aſſertion of this Authour.</s>
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            <p type="margin">
              <s>
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              The
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              on of the
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              tude of the fixed
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              Stars, in reſpect to
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              the grand Orb.
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              </s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>The errour then of theſe men, conſiſteth in being
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              treamly miſtaken, in taking the apparent Diameter of the fixed
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              Stars.</s>
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              <s>SALV. </s>
              <s>This is one, but not the onely errour of them; and
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              indeed, I do very much admire how ſo many
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              Aſtronomers,
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              and
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              thoſe very famous, as are
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              Alfagranus, Albategnus, Tebizius,
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              and
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              much more modernly the
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              Tycho's
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              and
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              Clavius's,
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              and in ſumm,
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              all the predeceſſors of our
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              Academian,
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              ſhould have been ſo groſly
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              miſtaken, in determining the magnitudes of all the Stars, as well
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              ſixed as moveable, the two Luminaries excepted out of that
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              ber; and that they have not taken any heed to the adventitious
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              irradiations that deceitfully repreſent them an hundred and more
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              times bigger, than when they are beheld, without thoſe </s>
            </p>
          </chap>
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