Galilei, Galileo, Mechanics, 1665

Page concordance

< >
Scan Original
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
< >
page |< < of 40 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <pb xlink:href="070/01/030.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
                <lb/>
              a greater Elevation than of 1/3 of a Right Angle, it being generated
                <lb/>
              by the Elevation of the Chanel A C: Therefore if we incline the
                <lb/>
              Column but 1/3 of the
                <lb/>
                <figure id="id.070.01.030.1.jpg" xlink:href="070/01/030/1.jpg"/>
                <lb/>
              ſaid Right Angle, and
                <lb/>
              a little more, as we ſee
                <lb/>
              I K H M, there is a
                <lb/>
              Tranſition and Moti­
                <lb/>
              on along the Chanel
                <lb/>
              I L: Therefore the
                <lb/>
              Water from the point
                <lb/>
              I to the point L ſhall
                <lb/>
              move deſcending, and
                <lb/>
              the Screw being turned
                <lb/>
              about, the other parts
                <lb/>
              of it ſhall ſucceſſively
                <lb/>
              diſpoſe or preſent
                <lb/>
              themſelves to the Wa­
                <lb/>
              ter in the ſame Poſition as the part I L: Whereupon the Water
                <lb/>
              ſhall go ſucceſſively deſcending, and in the end ſhall be found to
                <lb/>
              be aſcended from the point I to the point H. </s>
              <s>Which how admira­
                <lb/>
              ble a thing it is, I leave ſuch to judge who ſhall perfectly have un­
                <lb/>
              derſtood it. </s>
              <s>And by what hath been ſaid, we come to know, That
                <lb/>
              the Screw for raiſing of Water ought to be inclined a little more
                <lb/>
              than the quantity of the Angle of the Triangle by which the ſaid
                <lb/>
              Screw is deſcribed.</s>
            </p>
            <p type="head">
              <s>
                <emph type="italics"/>
              Of the Force of the
                <lb/>
              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
                <lb/>
              ents is neceſſary for many Reaſons: and firſt, becauſe that
                <lb/>
              there appeareth in it much more matter of admiration than
                <lb/>
              is obſerved in any other Mechanick Inſtrument whatſoever. </s>
              <s>For
                <lb/>
              ſtriking with the Hammer upon a Nail, which is to be driven into
                <lb/>
              a very tough Poſt, or with the Beetle upon a Stake that is to pene­
                <lb/>
              trate into very ſtiffe ground, we ſee, that by the ſole vertue of the
                <lb/>
              blow of the Percutient both the one and the other is thruſt for­
                <lb/>
              wards: ſo that without that, only laying the Beetle upon the
                <lb/>
              Nail or Stake it will not move then, nay, more, although you
                <lb/>
              ſhould lay upon them a Weight very much heavier than the ſaid
                <lb/>
              Beetle. </s>
              <s>An effect truly admirable, and ſo much the more worthy
                <lb/>
              of Contemplation, in that, as I conceive, none of thoſe who have </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>