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

Table of figures

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      <text>
        <body>
          <chap>
            <pb xlink:href="040/01/1013.jpg" pagenum="319"/>
            <p type="head">
              <s>A
                <lb/>
              LETTER
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              OF
                <lb/>
              Monſieur Des-Cartes
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              TO THE
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              REVEREND FATHER
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                <emph type="italics"/>
              MARIN MERSENNE.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>
                <emph type="italics"/>
              Reverend Father,
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>I Did think to have deferred writing unto you
                <lb/>
              yet eight or fifteen dayes, to the end I might
                <lb/>
              not trouble you too often with my Letters,
                <lb/>
              but I have received yours of the firſt of
                <emph type="italics"/>
              Sept.
                <emph.end type="italics"/>
                <lb/>
              which giveth me to underſtand that it is an
                <lb/>
              hard matter to admit the Principle which I
                <lb/>
              have ſuppoſed in my Examination of the
                <lb/>
              Geoſtatick Queſtion, and in regard that if it
                <lb/>
              be not true, all the reſt that I have inferred from it would be yet
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              leſſe true: I would not one onely day defer ſending you a more
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              particular Explication. </s>
              <s>It is requiſite above all things to conſider
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              that I did ſpeak of the Force that ſerveth to raiſe a Weight to ſome
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              heighth, the which Force hath evermore two Dimenſions, and not
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              of that which ſerveth in each point to ſuſtain it, which hath never
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              more than one Dimenſion, inſomuch that theſe two Forces differ
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              as much the one from the other, as a Superficies differs from a Line:
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              for the ſame Force which a Nail ought to have for the ſuſtaining of
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              a Weight of 100 pound one moment of time, doth alſo ſuffice for
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              to ſuſtain it the ſpace of a year, provided that it do not diminiſh,
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              but the ſame Quantity of this Force which ſerveth to raiſe the
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              Weight to the heighth of one foot, ſufficeth not
                <emph type="italics"/>
              (eadem numero)
                <emph.end type="italics"/>
                <lb/>
              to raiſe it two feet; and it is not more manifeſt that two and two
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              make four, than it's manifeſt that we are to employ double as much
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              therein.</s>
            </p>
            <p type="main">
              <s>Now, foraſmuch as that this is nothing but the ſame thing that
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              I have ſuppoſed for a Principle, I cannot gueſſe on what the Scruple
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              ſhould be grounded that men make of receiving it; but I ſhall in </s>
            </p>
          </chap>
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      </text>
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