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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              <pb o="38" file="0048" n="48" rhead="CAP. I. DE MACHINA MARLYENSI."/>
            quis iudicium accuratum uiri laude mea maioris
              <emph style="sc">Dn</emph>
            .
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            </s>
            <s xml:id="echoid-s767" xml:space="preserve">
              <emph style="sc">Fontenellii</emph>
            l. </s>
            <s xml:id="echoid-s768" xml:space="preserve">c. </s>
            <s xml:id="echoid-s769" xml:space="preserve">p. </s>
            <s xml:id="echoid-s770" xml:space="preserve">134. </s>
            <s xml:id="echoid-s771" xml:space="preserve">Cet effet du frottement ſeul
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            peut paroitre etonnant, et fort au deſſus de ce qu’on en au-
              <lb/>
            roit imaginé à vuë de paîs. </s>
            <s xml:id="echoid-s772" xml:space="preserve">par la il eſt aiſé de voir, combien
              <lb/>
            l’ on doit ſe meprendre, dans le calcul d’une machine, quand
              <lb/>
            on n’y conſidere que les rapports de la puiſſance et du poids,
              <lb/>
            et de leur diſtance du point d’ appui, et que l’on neglige les
              <lb/>
            frottement, comme on fait d’ ordinaire, ou du moins, que
              <lb/>
            l’ on compte qu’ils n’iront pas bien haut. </s>
            <s xml:id="echoid-s773" xml:space="preserve">Il ſe peut faire
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            aiſement, que la puiſſance perde par le frottement tout l’a-
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            vantage, qu’elle aura menagée, et que même elle devienne
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            malgré cela fort inferieure au poids.</s>
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            <s xml:id="echoid-s775" xml:space="preserve">40. </s>
            <s xml:id="echoid-s776" xml:space="preserve">Sub finem huius capitis addam monitum ge-
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            nerale, ad totius machinae Marlyacenſis conformatio-
              <lb/>
            nem pertinens. </s>
            <s xml:id="echoid-s777" xml:space="preserve">Conſtat inſignem uim eſſe caloris et
              <lb/>
            frigoris, in expandenda et contrahenda qualibet mate-
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            ria. </s>
            <s xml:id="echoid-s778" xml:space="preserve">Cum itaque in regio illo, de quo hactenus expli-
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            cui, opere, tanta multitudo, tantaque porrectio longu-
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            riorum ferreorum in catenis et antliarum apparatu ex-
              <lb/>
            iſtat, experientia docuit, ferra haec praelonga frigore
              <lb/>
            contracta, aum arctius connexa id liberius facere non
              <lb/>
            poſſent, rupta ſaepenumero fuiſſe, et alio tempore ca-
              <lb/>
            lore expanſa, difficilem machinae motum reddidiſſe.
              <lb/>
            </s>
            <s xml:id="echoid-s779" xml:space="preserve">Vtrique uitio tandem medela adhibita eſt, laxiore fer-
              <lb/>
            rorum copulatione facta, claui@@empe gracilioribus in
              <lb/>
            ampliora foramina immiſſis, embolisque et aliis mem-
              <lb/>
            bris ſimiliter ſuſpenſis, ut omnem in caſum aliqua eo-
              <lb/>
            rum uacillatio relinqueretur.</s>
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