Galilei, Galileo, Mechanics, 1665

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              <s>
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              the Beetle; we ſhall ceaſe to wonder at the Effect, which doth not
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              in the leaſt exceed the terms of Natural Conſtitutions, and of
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              what hath been ſpoken. </s>
              <s>Let us, for better underſtanding, give an
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              example thereof in particular Terms. </s>
              <s>There is a Beetle, which ha­
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              ving four degrees of Reſiſtance, is moved by ſuch a Force, that
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              being freed from it in that term where it maketh the Percuſſion, it
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              would, meeting with no ſtop, go ten Paces beyond it, and in that
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              term a great poſt being oppoſed to it, whoſe Reſiſtance to Moti­
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              on is as four thouſand, that is, a thouſand times greater than that of
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              the Beetle, (but yet is not immoveable) ſo that it without mea­
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              ſure or proportion exceeds the Reſiſtance of the Beetle, yet the
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              Percuſſion being made on it, it ſhall be driven forwards, though in­
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              deed no more but the thouſandth part of the ten Paces which the
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              Beetle ſhall be moved: and thus in an inverted method, changing
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              that which hath been ſpoken touching the other Mechanical Effects,
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              we may inveſtigate the reaſon of the Force of the Percutient. </s>
              <s>I
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              know that here ariſe difficulties and objections unto ſome, which
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              they will not eaſily be removed from, but we will freely remit them
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              to the ^{*} Problems Mechanical, which we ſhall adjoyn in the end of
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              this Diſcourſe.</s>
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              * Theſe Pro­
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              blems he here
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              promiſeth were
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              never yet ex­
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              tant.</s>
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