Mersenne, Marin; Galilei, Galileo, Qvestions physico-mathematiqves : et Les mechaniqves du sieur Galilee : avec Les Prelvdes de l' harmonie vniuerselle vtiles aux philosophes, aux medecins, aux astrologues, aux ingenieurs, & aux musiciens Les questions theologiques, physiques, morales, et mathematiques, 1635

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          <pb o="76" file="00355" n="354" rhead="Les Mechaniques"/>
          <p>
            <s xml:id="echoid-s4743" xml:space="preserve">En cinquieſme lieu, il faudr@ it conſi-
              <lb/>
            derer quelle eſt la viteſſe des mouue-
              <lb/>
            mens qui ſe font ſur les plans B E, C E,
              <lb/>
              <figure xlink:label="fig-00355-01" xlink:href="fig-00355-01a" number="44">
                <image file="00355-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/00355-01"/>
              </figure>
            & </s>
            <s xml:id="echoid-s4744" xml:space="preserve">D
              <lb/>
            E, qui
              <lb/>
            ſont
              <lb/>
            dans
              <lb/>
            le
              <lb/>
            quart
              <lb/>
            du
              <lb/>
            cer-
              <lb/>
            cle B
              <lb/>
            C E, & </s>
            <s xml:id="echoid-s4745" xml:space="preserve">quelle proportion elle a auec la
              <lb/>
            viteſſe du mouuement d’Aen E, dont la
              <lb/>
            partie A H ſe faiſant dans vn tĕps don-
              <lb/>
            né, tout le reſte depuis H iuſques à E ſe
              <lb/>
            fait dans vn autre temps egal. </s>
            <s xml:id="echoid-s4746" xml:space="preserve">Où il faut
              <lb/>
            encore remarquer que ſi l’on pend le
              <lb/>
            poids E à la chorde A E, & </s>
            <s xml:id="echoid-s4747" xml:space="preserve">qu’on tire le
              <lb/>
            poids iuſques à B, que B deſcĕdra quaſi
              <lb/>
            en meſme te mps de B à E par le quart
              <lb/>
            du cercle B C E qu’il deſcendra de C,
              <lb/>
            ou de D au meſme E. </s>
            <s xml:id="echoid-s4748" xml:space="preserve">Or les lignes Bk,
              <lb/>
            K L, & </s>
            <s xml:id="echoid-s4749" xml:space="preserve">L M font veoir combien les
              <lb/>
            poids deſcendĕt ſurles plans C E & </s>
            <s xml:id="echoid-s4750" xml:space="preserve">D E,
              <lb/>
            & </s>
            <s xml:id="echoid-s4751" xml:space="preserve">conſequemment de combien il ſont
              <lb/>
            retardez, & </s>
            <s xml:id="echoid-s4752" xml:space="preserve">empeſchez par chaque plan
              <lb/>
            ineliné: </s>
            <s xml:id="echoid-s4753" xml:space="preserve">par exĕple, le poids B </s>
          </p>
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    </echo>
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