Galilei, Galileo, The systems of the world, 1661

Page concordance

< >
Scan Original
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
< >
page |< < of 948 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="065/01/139.jpg" pagenum="131"/>
              therefore if that ſtone let fall from the round top, ought to
                <lb/>
              low the motion of the ſhip, that effect ſhould be aſcribed to the
                <lb/>
              Air, and not to the vertue impreſſed. </s>
              <s>But you preſuppoſe that
                <lb/>
              the Air doth not follow the motion of the ſhip, but is tranquil.
                <lb/>
              </s>
              <s>Moreover, he that letteth it fall, is not to throw it, or to give
                <lb/>
              it
                <emph type="italics"/>
              impetus
                <emph.end type="italics"/>
              with his arm, but ought barely to open his hand and let
                <lb/>
              it go; and by this means, the ſtone, neither through the vertue
                <lb/>
              impreſſed by the projicient, nor through the help of the Air,
                <lb/>
              ſhall be able to follow the ſhips motion, and therefore ſhall be
                <lb/>
              left behind.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg317"/>
                <emph type="italics"/>
              The project
                <lb/>
              cording to
                <emph.end type="italics"/>
                <lb/>
              tle,
                <emph type="italics"/>
              is not moved by
                <lb/>
              vertue impreſſed,
                <lb/>
              but by the
                <emph.end type="italics"/>
              medium.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>I think then that you would ſay, that if the ſtone be
                <lb/>
              not thrown by the arm of that perſon, it is no longer a
                <lb/>
              jection.</s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>It cannot be properly called a motion of projection.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>So then that which
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              ſpeaks of the motion, the
                <lb/>
              moveable, and the mover of the projects, hath nothing to do
                <lb/>
              with the buſineſſe in hand; and if it concern not our purpoſe,
                <lb/>
              why do you alledg the ſame?</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>I produce it on the oceaſion of that impreſſed vertue,
                <lb/>
              named and introduced by you, which having no being in the
                <lb/>
              World, can be of no force; for
                <emph type="italics"/>
              non-entium nullæ ſunt
                <lb/>
              nes
                <emph.end type="italics"/>
              ; and therefore not onely of projected, but of all other
                <lb/>
              ternatural motions, the moving cauſe ought to be aſcribed to the
                <lb/>
                <emph type="italics"/>
              medium,
                <emph.end type="italics"/>
              of which there hath been no due conſideration had;
                <lb/>
              and therefore all that hath been ſaid hitherto is to no purpoſe.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>Go to now, in good time. </s>
              <s>But tell me, ſeeing that
                <lb/>
              your inſtance is wholly grounded upon the nullity of the vertue
                <lb/>
              impreſſed, if I ſhall demonſtrate to you, that the
                <emph type="italics"/>
              medium
                <emph.end type="italics"/>
              hath
                <lb/>
              nothing to do in the continuation of projects, after they are
                <lb/>
              patated from the projicient, will you admit of the impreſſed
                <lb/>
              tue, or will you make another attempt to overthrow it?</s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>The operation of the
                <emph type="italics"/>
              medium
                <emph.end type="italics"/>
              being removed, I ſee not
                <lb/>
              how one can have recourſe to any thing elſe ſave the faculty
                <lb/>
              preſſed by the mover.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>It would be well, for the removing, as much as is
                <lb/>
              poſſible, the occaſions of multiplying contentions, that you
                <lb/>
              would explain with as much diſtinctneſſe as may be, what is that
                <lb/>
              operation of the
                <emph type="italics"/>
              medium
                <emph.end type="italics"/>
              in continuing the motion of the
                <lb/>
                <arrow.to.target n="marg318"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg318"/>
                <emph type="italics"/>
              Operation of the
                <emph.end type="italics"/>
                <lb/>
              medium
                <emph type="italics"/>
              in
                <lb/>
              ing the motion of
                <lb/>
              the project.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SIMP. </s>
              <s>The projicient hath the ſtone in his hand, and with
                <lb/>
              force and violence throws his arm, with which jactation the
                <lb/>
              ſtone doth not move ſo much as the circumambient Air; ſo that
                <lb/>
              when the ſtone at its being forſaken by the hand, findeth it ſelf
                <lb/>
              in the Air, which at the ſame time moveth with impetouſity, it
                <lb/>
              is thereby born away; for, if the air did not operate, the ſtone
                <lb/>
              would fall at the foot of the projicient or thrower.</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum