Weidler, Johann Friedrich, Jo. Friderici Weidleri Tractatus de machinis hydraulicis toto terrarum orbe maximis Marlyensi et Londinensi et aliis rarioribus similibus in quo mensurae prope ipsas machinas notatae describuntur, et de viribus earum luculenter disseritur

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          <p>
            <s xml:id="echoid-s685" xml:space="preserve">
              <pb o="34" file="0044" n="44" rhead="CAPVT I."/>
            tantum uitium latet, qui
              <unsure/>
            a reliqui ſatis apte conſen-
              <lb/>
            tiunt.</s>
            <s xml:id="echoid-s686" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s687" xml:space="preserve">38. </s>
            <s xml:id="echoid-s688" xml:space="preserve">Peropportune interim accidit, ut magnus ita ex-
              <lb/>
            ceſſus uirium, ſi ponderum mouendorum ratio habea-
              <lb/>
            tur, in machina Marlyenſi occurrat. </s>
            <s xml:id="echoid-s689" xml:space="preserve">Nam non ſem-
              <lb/>
            per ea, quam aſſumſimus fluminis altitudo eſt, nec
              <lb/>
            aquae per totum uolumen ſuum ſimilem ubique per-
              <lb/>
            cuſſionem efficiunt, ſiquidem diligentior huius materiae
              <lb/>
            perueſtigatio oſtendit, aquas in alueo ſuo deuolutas
              <lb/>
            non omnes eandem aſſequi uelocitatem quia ſuperio-
              <lb/>
            res, etſi cum inferioribus ſecundum eandem decliuita-
              <lb/>
            tem progrediantur, liberius tamen his mouentur, quae
              <lb/>
            et plus ab incumbentibus onerantur, et propria tenaci-
              <lb/>
            tate retinentur. </s>
            <s xml:id="echoid-s690" xml:space="preserve">Agit de hac re ex inſtituto
              <emph style="sc">Mariot</emph>
            -
              <lb/>
              <emph style="sc">TIVS</emph>
            Part. </s>
            <s xml:id="echoid-s691" xml:space="preserve">2. </s>
            <s xml:id="echoid-s692" xml:space="preserve">p. </s>
            <s xml:id="echoid-s693" xml:space="preserve">200 ſq. </s>
            <s xml:id="echoid-s694" xml:space="preserve">et inprimis experimenta quae-
              <lb/>
            dam laudat, quae hic eiusdem uerbis repeti merentur.
              <lb/>
            </s>
            <s xml:id="echoid-s695" xml:space="preserve">J ay encore remarque ſouvent des herbes, que l’eau emme-
              <lb/>
            noit, et je voyo
              <unsure/>
            is manifeſtement, que celles qui etant entre
              <lb/>
            deux eaux pres du fond plus avancées, que celles qui etoient pres
              <lb/>
            de la ſurface, etoient bientot paſſées et laiſſées en arriere par les
              <lb/>
            ſuperieures; </s>
            <s xml:id="echoid-s696" xml:space="preserve">et ſi je jettois dans le meme courant une poignée
              <lb/>
            de groſſes ſcieures de bois qui alloient au fond plutot les unes
              <lb/>
            que les autres, je voyois toujours les ſuperieures preceder les
              <lb/>
            autres par ordre à proportion, qu’elles etoient plus ou moins
              <lb/>
            eloignées du fond. </s>
            <s xml:id="echoid-s697" xml:space="preserve">des quelles experie@ces il paroit, que dans
              <lb/>
            les rivieres qui coulent librement, l’eau ſuperieure va plus
              <lb/>
            vite que celle qui eſt proche du fond, et que dans celles qui
              <lb/>
            ſont contraintes de paſſer en un lieu etroit, etant retenuës
              <lb/>
            de deux cotés, celle du milieu va plus vite, que celle de la
              <lb/>
            ſurface, s’il n’y a que trois ou quatre pieds de profondeur. </s>
            <s xml:id="echoid-s698" xml:space="preserve">
              <lb/>
            add. </s>
            <s xml:id="echoid-s699" xml:space="preserve">
              <emph style="sc">Dechales</emph>
            Mund. </s>
            <s xml:id="echoid-s700" xml:space="preserve">Math. </s>
            <s xml:id="echoid-s701" xml:space="preserve">Tom. </s>
            <s xml:id="echoid-s702" xml:space="preserve">3. </s>
            <s xml:id="echoid-s703" xml:space="preserve">p. </s>
            <s xml:id="echoid-s704" xml:space="preserve">138.</s>
            <s xml:id="echoid-s705" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s706" xml:space="preserve">39. </s>
            <s xml:id="echoid-s707" xml:space="preserve">Quae autem antea § 34. </s>
            <s xml:id="echoid-s708" xml:space="preserve">et 38. </s>
            <s xml:id="echoid-s709" xml:space="preserve">dixi, de augen-
              <lb/>
            da quantitate ponderis mouendi ob affrictum et </s>
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