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

Table of figures

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <pb xlink:href="040/01/994.jpg" pagenum="300"/>
              <s>But although the Column ſtand erect at Right-Angles, yet for all
                <lb/>
              that, the Riſe along the Screw, folded about the Column, is not of
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              a greater Elevation than of 1/3 of a Right Angle, it being generated
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              by the Elevation of the Chanel A C: Therefore if we incline the
                <lb/>
              Column but 1/3 of the
                <lb/>
                <figure id="id.040.01.994.1.jpg" xlink:href="040/01/994/1.jpg" number="206"/>
                <lb/>
              ſaid Right Angle, and
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              a little more, as we ſee
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              I K H M, there is a
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              Tranſition and Moti­
                <lb/>
              on along the Chanel
                <lb/>
              I L: Therefore the
                <lb/>
              Water from the point
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              I to the point L ſhall
                <lb/>
              move deſcending, and
                <lb/>
              the Screw being turned
                <lb/>
              about, the other parts
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              of it ſhall ſucceſſively
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              diſpoſe or preſent
                <lb/>
              themſelves to the Wa­
                <lb/>
              ter in the ſame Poſition as the part I L: Whereupon the Water
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              ſhall go ſucceſſively deſcending, and in the end ſhall be found to
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              be aſcended from the point I to the point H. </s>
              <s>Which how admira­
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              ble a thing it is, I leave ſuch to judge who ſhall perfectly have un­
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              derſtood it. </s>
              <s>And by what hath been ſaid, we come to know, That
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              the Screw for raiſing of Water ought to be inclined a little more
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              than the quantity of the Angle of the Triangle by which the ſaid
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              Screw is deſcribed.</s>
            </p>
            <p type="head">
              <s>
                <emph type="italics"/>
              Of the Force of the
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              HAMMER, MALLET, or BEETLE.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>The Inveſtigation of the cauſe of the Force of theſe Percuti­
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              ents is neceſſary for many Reaſons: and firſt, becauſe that
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              there appeareth in it much more matter of admiration than
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              is obſerved in any other Mechanick Inſtrument whatſoever. </s>
              <s>For
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              ſtriking with the Hammer upon a Nail, which is to be driven into
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              a very tough Poſt, or with the Beetle upon a Stake that is to pene­
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              trate into very ſtiffe ground, we ſee, that by the ſole vertue of the
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              blow of the Percutient both the one and the other is thruſt for­
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              wards: ſo that without that, only laying the Beetle upon the
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              Nail or Stake it will not move then, nay, more, although you
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              ſhould lay upon them a Weight very much heavier than the ſaid
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              Beetle. </s>
              <s>An effect truly admirable, and ſo much the more worthy
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              of Contemplation, in that, as I conceive, none of thoſe who have </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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