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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            <s xml:id="echoid-s11575" xml:space="preserve">
              <pb o="495" file="0509" n="509" rhead="CORPORUM FIRMORUM."/>
            deret: </s>
            <s xml:id="echoid-s11576" xml:space="preserve">Supervacaneus videbitur Geometris noſter labor, imptimis
              <lb/>
            cum demonſtravimus in Propoſitione VIII. </s>
            <s xml:id="echoid-s11577" xml:space="preserve">duorum corporum cylin-
              <lb/>
            dricorum ejusdem materiæ, diverſam craſſitiem habentium, Cohæ-
              <lb/>
            rentiam fore in ratione craſſitierum: </s>
            <s xml:id="echoid-s11578" xml:space="preserve">quod veriſſimum eſt, & </s>
            <s xml:id="echoid-s11579" xml:space="preserve">in-
              <lb/>
            ſtar Axiomatis ponendum, ſi corpora, quibus vis infertur, ut fran-
              <lb/>
            gantur, maneant æque craſſa; </s>
            <s xml:id="echoid-s11580" xml:space="preserve">ſed an ea, quæ cedunt interim ob
              <lb/>
            flexilitatem, & </s>
            <s xml:id="echoid-s11581" xml:space="preserve">attenuantur, qualia ſunt Metalla, eidem Legi ſub-
              <lb/>
            jiciantur, mihi non ſatis liquido conſtabat; </s>
            <s xml:id="echoid-s11582" xml:space="preserve">de eo dubitaſſe poſtea
              <lb/>
            non pœnituit, cum Experientia evicerit, hic aliquid latere, acceden-
              <lb/>
            te Cohærentia quidem utcunque ad craſſitierum proportionem, non
              <lb/>
            tamen accurate. </s>
            <s xml:id="echoid-s11583" xml:space="preserve">Verum prius apparatum Experimentorum exacte
              <lb/>
            deſcribam: </s>
            <s xml:id="echoid-s11584" xml:space="preserve">Præparata fuerunt ex quolibet Metallo fila quatuor,
              <lb/>
            craſſiſſimi diameter erat {1/10} pollicis Rhenolandici, hoc in poſte-
              <lb/>
            rum inſigniam littera A. </s>
            <s xml:id="echoid-s11585" xml:space="preserve">Secundum, cujus craſſities minor erat,
              <lb/>
            habebat baſin vel craſſitiem, quæ ad eam in A fuit exacte uti 3 ad
              <lb/>
            4 hanc craſſitiem vocabo B. </s>
            <s xml:id="echoid-s11586" xml:space="preserve">Tertii fili craſſities ſive baſis erat ad
              <lb/>
            eam B uti 2 ad 3. </s>
            <s xml:id="echoid-s11587" xml:space="preserve">hanc craſſitiem vocabo C. </s>
            <s xml:id="echoid-s11588" xml:space="preserve">Quarti fili craſſities
              <lb/>
            erat ad eam C uti 1 and 2. </s>
            <s xml:id="echoid-s11589" xml:space="preserve">hanc vocabo D. </s>
            <s xml:id="echoid-s11590" xml:space="preserve">erant igitur baſes, ſive
              <lb/>
            craſſities filorum, uti 4, 3, 2, 1.</s>
            <s xml:id="echoid-s11591" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11592" xml:space="preserve">Fila omnia craſſitiei A ducta fuerunt per idem foramen lamellæ
              <lb/>
            indurati Chalybis inflictum, ut accuratiſſime forent æque craſſa:
              <lb/>
            </s>
            <s xml:id="echoid-s11593" xml:space="preserve">ita per aliud foramen ducta fuerunt fila omnia B. </s>
            <s xml:id="echoid-s11594" xml:space="preserve">per aliud omnia
              <lb/>
            C. </s>
            <s xml:id="echoid-s11595" xml:space="preserve">per aliud omnia D.</s>
            <s xml:id="echoid-s11596" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s11597" xml:space="preserve">Quoniam omnia Metalla majorem rigiditatem acquirunt cum ita
              <lb/>
            ducuntur per hæc foramina, igni carbonum ligneorum puriſſimo-
              <lb/>
            rum immitebantur Aurum, Argentum, Cuprum, Ferrum, & </s>
            <s xml:id="echoid-s11598" xml:space="preserve">le-
              <lb/>
            viter candefacta, emollita fuerunt tam æquabiliter quantum fieri po-
              <lb/>
            teſt, cavendo ſimul ne ſuperficies ſcorias contraheret, atque ita te-
              <lb/>
            nuius fieret filum: </s>
            <s xml:id="echoid-s11599" xml:space="preserve">ut hæc ope Machinæ divulſoriæ examinaren-
              <lb/>
            tur, confecti fuerunt duo ferrei unci. </s>
            <s xml:id="echoid-s11600" xml:space="preserve">Tab. </s>
            <s xml:id="echoid-s11601" xml:space="preserve">XX. </s>
            <s xml:id="echoid-s11602" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s11603" xml:space="preserve">3. </s>
            <s xml:id="echoid-s11604" xml:space="preserve">plusquam
              <lb/>
            duplo longiores & </s>
            <s xml:id="echoid-s11605" xml:space="preserve">craſſiores quam hic depinguntur, quorum capi-
              <lb/>
            tibus A, B inflicta erant foramina quadrata, quibus conveniebant
              <lb/>
            pinnæ fieret, formæ & </s>
            <s xml:id="echoid-s11606" xml:space="preserve">magnitudinis ac una proſtat in Tab. </s>
            <s xml:id="echoid-s11607" xml:space="preserve">XX.
              <lb/>
            </s>
            <s xml:id="echoid-s11608" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s11609" xml:space="preserve">4. </s>
            <s xml:id="echoid-s11610" xml:space="preserve">in medio erat cylindrica & </s>
            <s xml:id="echoid-s11611" xml:space="preserve">polita, circa quam partem fi-
              <lb/>
            lum metallicum circumvolvendum fuit, eratque ad latus pertuſum
              <lb/>
            foramine K, per quod filum transmittebatur, ut melius figi </s>
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