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

Table of figures

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="040/01/154.jpg" pagenum="136"/>
              level'd on the top of a Tower, and ſhots were made therewith
                <lb/>
              point blank, that is, paralel to the Horizon, let the Piece have a
                <lb/>
              greater or leſs charge, ſo as that the ball may fall ſometimes a
                <lb/>
              thouſand yards diſtant, ſometimes four thouſand, ſometimes ſix,
                <lb/>
              ſometimes ten,
                <emph type="italics"/>
              &c.
                <emph.end type="italics"/>
              and all theſe ſhots ſhall curry or finiſh their
                <lb/>
              ranges in times equal to each other, and every one equal to the
                <lb/>
              time which the ball would take to paſs from the mouth of the
                <lb/>
              Piece to the ground, being left, without other impulſe, to fall
                <lb/>
              ſimply downwards in a perpendicular line. </s>
              <s>Now it ſeems a very
                <lb/>
              admirable thing, that in the ſame ſhort time of its falling
                <lb/>
              dicularly down to the ground, from the height of, ſuppoſe, an
                <lb/>
              hundred yards, the ſame ball, being thruſt violently out of the
                <lb/>
              Piece by the Fire, ſhould be able to paſs one while four hundred,
                <lb/>
              another while a thouſand, another while four, another while ten
                <lb/>
              thouſand yards, ſo as that the ſaid ball in all ſhots made point
                <lb/>
              blank, always continueth an equal time in the air.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg321"/>
                <emph type="italics"/>
              An admirable
                <lb/>
              accident in the
                <lb/>
              tion of projects.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg322"/>
              *By the length of
                <lb/>
              the maſt he means
                <lb/>
              the diſtance
                <lb/>
              tween the
                <lb/>
              deck and
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              top.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg323"/>
              * La palla.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>The conſideration for its novelty is very pretty, and if
                <lb/>
              the effect be true, very admirable: and of the truth thereof, I
                <lb/>
              make no queſtion: and were it not for the accidental impediment
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              of the air, I verily believe, that, if at the time of the balls going
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              out of the Piece, another were let fall from the ſame height
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              rectly downwards, they would both come to the ground at the
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              ſame inſtant, though that ſhould have curried ten thouſand
                <lb/>
              miles in its range, and this but an hundred onely: preſuppoſing
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              the ſurface of the Earth to be equal, which to be aſſured of, the
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              experiment may be made upon ſome lake. </s>
              <s>As for the impediment
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              which might come from the air, it would conſiſt in retarding the
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              extreme ſwift motion of the ſhot. </s>
              <s>Now, if you think fit, we will
                <lb/>
              proceed to the ſolution of the other Objections, ſeeing that
                <emph type="italics"/>
                <lb/>
              plicius
                <emph.end type="italics"/>
              (as far as I can ſee) is convinc'd of the nullity of this firſt,
                <lb/>
              taken from things falling from on high downwards.</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>I find not all my ſcruples removed, but it may be the
                <lb/>
              fault is my own, as not being of ſo eaſie and quick an apprehenſion
                <lb/>
              as
                <emph type="italics"/>
              Sagredus.
                <emph.end type="italics"/>
              And it ſeems to me, that if this motion, of which
                <lb/>
              the ſtone did partake whilſt it was on the Round-top of the Ships
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              Maſt, be, as you ſay, to conſerve it ſelf indelibly in the ſaid ſtone,
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              even after it is ſeparated from the Ship, it would follow, that
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              wiſe in caſe any one, riding a horſe that was upon his ſpeed, ſhould
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              let a bowl drop out of his hand, that bowl being fallen to the
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              ground would continue its motion and follow the horſes ſteps,
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              without tarrying behind him: the which effect, I believe, is not
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              to be ſeen, unleſs when he that is upon the horſe ſhould throw it
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              with violence that way towards which he runneth; but otherwiſe,
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              I believe it will ſtay on the ground in the ſame place where it
                <lb/>
              fell.</s>
            </p>
          </chap>
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    </archimedes>
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