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

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      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="040/01/152.jpg" pagenum="134"/>
              the courſe of the wind, and the other ſidelong, the wind will
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              quickly carry away this later, and leave the other where it was;
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              and the ſame to my ſeeming, ought to happen, if the Doctrine of
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                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              were true, of thoſe two ſhot out of a Bow: foraſmuch
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              as the arrow ſhot ſideways is driven by a great quantity of Air,
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              moved by the bowſtring, to wit by as much as the ſaid ſtring is
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              long, whereas the other arrow receiveth no greater a quantity of
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              air, than the ſmall circle of the ſtrings thickneſs. </s>
              <s>And I cannot
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              imagine what may be the reaſon of ſuch a difference, but would
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              fain know the ſame.</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>The cauſe ſeemeth to me ſufficiently manifeſt; and it
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              is, becauſe the arrow ſhot endways, hath but a little quantity of
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              air to penetrate, and the other is to make its way through a
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              tity as great as its whole length.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>Then it ſeems the arrows ſhot, are to penetrate the air?
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              </s>
              <s>but if the air goeth along with them, yea, is that which carrieth
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              them, what penetration can they make therein? </s>
              <s>Do you not ſee
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              that, in this caſe, the arrow would of neceſſity move with greater
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              velocity than the air? </s>
              <s>and this greater velocity, what doth confer
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              it on the arrow? </s>
              <s>Will you ſay the air giveth them a velocity
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              greater than its own? </s>
              <s>Know then,
                <emph type="italics"/>
              Simplicius,
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              that the buſineſs
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              proceeds quite contrary to that which
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              ſaith, and that the </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg320"/>
                <lb/>
                <emph type="italics"/>
              medium
                <emph.end type="italics"/>
              conferreth the motion on the project, is as falſe, as it is
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              true, that it is the onely thing which procureth its obſtruction; and
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              having known this, you ſhall underſtand without finding any thing
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              whereof to make queſtion, that if the air be really moved, it doth
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              much better carry the dart along with it longways, than endways,
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              for that the air which impelleth it in that poſture, is much, and in
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              this very little. </s>
              <s>But ſhooting with the Bow, foraſmuch as the air
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              ſtands ſtill, the tranſverſe arrow, being to force its paſſage through
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              much air, comes to be much impeded, and the other that was nock't
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              eaſily overcometh the obſtruction of the ſmall quantity of air,
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              which oppoſeth it ſelf thereto.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg320"/>
                <emph type="italics"/>
              The
                <emph.end type="italics"/>
              medium
                <emph type="italics"/>
              doth
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              impede and not
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              fer the motion of
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              projects.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>How many Propoſitions have I obſerved in
                <emph type="italics"/>
              Ariſtotle,
                <emph.end type="italics"/>
                <lb/>
              (meaning ſtill in Natural Philoſophy) that are not onely falſe,
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              but falſe in ſuch ſort, that its diametrical contrary is true, as it
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              happens in this caſe. </s>
              <s>But purſuing the point in hand, I think that
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                <emph type="italics"/>
              Simplicius
                <emph.end type="italics"/>
              is perſwaded, that, from ſeeing the ſtone always to fall
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              in the ſame place, he cannot conjecture either the motion or
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              bility of the Ship: and if what hath been hitherto ſpoken,
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              ſhould not ſuffice, there is the Experiment of the
                <emph type="italics"/>
              medium
                <emph.end type="italics"/>
              which
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              may thorowly aſſure us thereof; in which experiment, the moſt
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              that could be ſeen would be, that the cadent moveable might be
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              left behind, if it were light, and that the air did not follow the
                <lb/>
              motion of the ſhip: but in caſe the air ſhould move with equal </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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