Musschenbroek, Petrus van, Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae

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          <p>
            <s xml:id="echoid-s11829" xml:space="preserve">
              <pb o="506" file="0520" n="520" rhead="INTRODUCTIO AD COHÆRENTIAM"/>
            logabantur & </s>
            <s xml:id="echoid-s11830" xml:space="preserve">rumpebantur: </s>
            <s xml:id="echoid-s11831" xml:space="preserve">calor hic ab attritu partium ſupra ſe
              <lb/>
            motarum & </s>
            <s xml:id="echoid-s11832" xml:space="preserve">valde preſſarum, cum attenuatur Metallum, oritur:
              <lb/>
            </s>
            <s xml:id="echoid-s11833" xml:space="preserve">præterea ruptum Metallum, modo antea valde tenſum, in tremo-
              <lb/>
            res concitatiſſimos abit, quibus partes nunc excurrendo, nunc rede-
              <lb/>
            undo, ſeſe mutuo inſigniter fricabant, atterebantque, & </s>
            <s xml:id="echoid-s11834" xml:space="preserve">eo modo
              <lb/>
            ignem colligebant.</s>
            <s xml:id="echoid-s11835" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11836" xml:space="preserve">Quicunque deſcripta a nobis Experimenta comparat cumiis, quæ
              <lb/>
            adfert de Lanis in Magiſterio naturæ & </s>
            <s xml:id="echoid-s11837" xml:space="preserve">artis Lib. </s>
            <s xml:id="echoid-s11838" xml:space="preserve">XI. </s>
            <s xml:id="echoid-s11839" xml:space="preserve">Cap. </s>
            <s xml:id="echoid-s11840" xml:space="preserve">1. </s>
            <s xml:id="echoid-s11841" xml:space="preserve">§ 22.
              <lb/>
            </s>
            <s xml:id="echoid-s11842" xml:space="preserve">facile perſpiciet, hunc Autorem Experimenta ſpectantia corporum
              <lb/>
            Cohærentiam tantum exſuo cerebello extruſiſſe, tentaſſe vero nihil: </s>
            <s xml:id="echoid-s11843" xml:space="preserve">
              <lb/>
            hæc enim habet. </s>
            <s xml:id="echoid-s11844" xml:space="preserve">Nexus partium in metallis omnium robuſtiſſimus,
              <lb/>
            & </s>
            <s xml:id="echoid-s11845" xml:space="preserve">qui maxime reſiſtit fractioni videtur eſſe in Chalybe, tum in Fer-
              <lb/>
            ro, deinde vero in Ære, poſthæc in Argento, ac deinde in Auro,
              <lb/>
            demum in Stanno & </s>
            <s xml:id="echoid-s11846" xml:space="preserve">Plumbo; </s>
            <s xml:id="echoid-s11847" xml:space="preserve">nimirum ſi ſumas ſingula fila Cylin-
              <lb/>
            drica ex ſingulis metallis, inter ſe omnino æqualia ſecundum craſſi-
              <lb/>
            tiem, atque illis appendas diverſa pondera, donec frangantur,
              <lb/>
            filum chalybeum majus pondus ſuſtinebit, ac cætera deinceps, eo or-
              <lb/>
            dine, quem dicebamus,</s>
          </p>
          <p>
            <s xml:id="echoid-s11848" xml:space="preserve">Longe melius profecto Merſennus in Lib. </s>
            <s xml:id="echoid-s11849" xml:space="preserve">3. </s>
            <s xml:id="echoid-s11850" xml:space="preserve">Harmonices prop. </s>
            <s xml:id="echoid-s11851" xml:space="preserve">7.
              <lb/>
            </s>
            <s xml:id="echoid-s11852" xml:space="preserve">ex Experientiâ metallorum Cohærentiam determinavit, quem ſi
              <lb/>
            conſuluiſſet de Lanis, Auro maximum robur competere deprehen-
              <lb/>
            diſſet: </s>
            <s xml:id="echoid-s11853" xml:space="preserve">convenit Merſenniana adduxiſſe, ut noſtra tentamina con-
              <lb/>
            ſirmentur. </s>
            <s xml:id="echoid-s11854" xml:space="preserve">Electæ fuerunt fides metallicæ, quarum craſſities fuit
              <lb/>
            {3/16} lineæ quam proxime, longæ 1 {1/2} pedes: </s>
            <s xml:id="echoid-s11855" xml:space="preserve">illi, quæ ex Auro puro
              <lb/>
            confecta fuit, appendi potuerunt libræ 23, a quibus frangebatur: </s>
            <s xml:id="echoid-s11856" xml:space="preserve">
              <lb/>
            hujus firmitati proxima fuit fides ex Auro mixto, quod erat 22
              <lb/>
            partium: </s>
            <s xml:id="echoid-s11857" xml:space="preserve">fides ex Argento æqualis roboris cum binis præcedenti-
              <lb/>
            bus dicitur fuiſſe. </s>
            <s xml:id="echoid-s11858" xml:space="preserve">hoc tamen non bene convenit cum noſtris, qui-
              <lb/>
            bus minorem Cohærentiam Argenti deprehendimus: </s>
            <s xml:id="echoid-s11859" xml:space="preserve">fides ferrea
              <lb/>
            fracta fuit a libris 19. </s>
            <s xml:id="echoid-s11860" xml:space="preserve">chorda cuprea & </s>
            <s xml:id="echoid-s11861" xml:space="preserve">ænea æqualis fuit roboris
              <lb/>
            & </s>
            <s xml:id="echoid-s11862" xml:space="preserve">fracta a libris 18. </s>
            <s xml:id="echoid-s11863" xml:space="preserve">Chorda ex Inteſtinis ovium facta & </s>
            <s xml:id="echoid-s11864" xml:space="preserve">æque
              <lb/>
            craſſa cum priori fracta fuit a libris 7.</s>
            <s xml:id="echoid-s11865" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11866" xml:space="preserve">A methodo diverſa ſuſpenſionis facile potuit oriri diſcrepantia,
              <lb/>
            quæ inter Experimenta noſtra & </s>
            <s xml:id="echoid-s11867" xml:space="preserve">Merſenniana obtinet.</s>
            <s xml:id="echoid-s11868" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11869" xml:space="preserve">Convenit hic quoque egiſſe de Cohærentia abſoluta Vitri, quod
              <lb/>
            quoniam maxime homogeneum corpus eſſe videtur, </s>
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