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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[651.] EXPERIMENTUM CCXXXVI.
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[652.] EXPERIMENTUM CCXXXVII.
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[653.] EXPERIMENTUM CCXXXVIII.
Page: 674 (657)
[654.] EXPERIMENTUM CCXXXIX.
Page: 674 (657)
[655.] EXPERIMENTUM CCXL.
Page: 674 (657)
[656.] EXPERIMENTUM CCXLI.
Page: 674 (657)
[657.] EXPERIMENTUM CCXLII.
Page: 674 (657)
[658.] EXPERIMENTUM CCXLIII.
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[659.] PROPOSITIO CXVIII.
Page: 675 (658)
[660.] PROPOSITIO CXIX.
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[661.] Regula prima.
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[662.] Regula Secunda.
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[663.] Regula Tertia.
Page: 683 (666)
[664.] TABULA
Page: 684 (667)
[665.] CAPUT DECIMUM. Tentamen de corporum Duritie.
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[666.] EPHEMERIDES METEOROLOGICÆ ULTRAJECTINÆ ANNI MDCCXXVIII.
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[667.] FINIS.
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              <pb o="670" file="0686" n="687" rhead="INTRODUCTIO AD COHÆRENTIAM"/>
            molle, ictuumque numerum duritiem exhibiturum.</s>
            <s xml:id="echoid-s17017" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s17018" xml:space="preserve">Verum plurima corpora diverſa gravitate ſpecifica donantur,
              <lb/>
            nec ſub eodem volumine eandem quantitatem corpoream compre-
              <lb/>
            hendunt, adeoque cum parallelopipeda æque magna diſſecan-
              <lb/>
            tur, non eadem quantitas corporea dividitur, ſed graviorum
              <lb/>
            major, leviorum minor, unde ictuum in cuneum illapſorum quan-
              <lb/>
            titas duritiem exhibere non poterit corporum. </s>
            <s xml:id="echoid-s17019" xml:space="preserve">niſi dividantur per
              <lb/>
            gravitatem corporum, quotientes tum exhibebunt durities quæſi-
              <lb/>
            tas: </s>
            <s xml:id="echoid-s17020" xml:space="preserve">Ut ictus corporis percutientis cuneum ſemper foret æqualis,
              <lb/>
            adhibita fuit Machina percuſſoria, quam exhibet Tab. </s>
            <s xml:id="echoid-s17021" xml:space="preserve">XXVIII.
              <lb/>
            </s>
            <s xml:id="echoid-s17022" xml:space="preserve">fig. </s>
            <s xml:id="echoid-s17023" xml:space="preserve">3, ex filo H K A ſuſpenſus fuit globus eburneus A, qui elevatus
              <lb/>
            continuo uſque ad normam exſtantem B, indeque dimiſſus, ſemper
              <lb/>
            cadebat cum eadem velocitate, iiſdemque viribus in cuneum C D. </s>
            <s xml:id="echoid-s17024" xml:space="preserve">
              <lb/>
            ſollicite cautum fuit, ut hujus globi centrum oſcillationis directe
              <lb/>
            ſemper percuſſerit cuneum C D; </s>
            <s xml:id="echoid-s17025" xml:space="preserve">erat G parallelopipedum plum-
              <lb/>
            beum 100 librarum, ut foret immobile, & </s>
            <s xml:id="echoid-s17026" xml:space="preserve">orbatum elaſticitate ex
              <lb/>
            ictu oriunda: </s>
            <s xml:id="echoid-s17027" xml:space="preserve">E F exhibet parallelopipedum tranſverſe ſecandum: </s>
            <s xml:id="echoid-s17028" xml:space="preserve">
              <lb/>
            C D eſt ferreus cuneus, cujus acies primo reddita fuit politiſſima,
              <lb/>
            atque inclinata planities lævigatiſſima & </s>
            <s xml:id="echoid-s17029" xml:space="preserve">plana: </s>
            <s xml:id="echoid-s17030" xml:space="preserve">manu detinui cu-
              <lb/>
            neum C D, ut eadem vi applicaretur corpori E F, nec reſiliri poſ-
              <lb/>
            ſet facto ictu, ſuftinebatur tamen inferius a plano, ut accuratiſſi-
              <lb/>
            me ab A feriretur: </s>
            <s xml:id="echoid-s17031" xml:space="preserve">certo ictuum numero abſoluto deprehendebam
              <lb/>
            ultimum non requiri tantum, ac priores fuerant, ad corporis in-
              <lb/>
            tegram diſciſſionem, tum globus ex minori altitudine elevatus fuit,
              <lb/>
            indeque fractiones ſurrexerunt, quæ ſimul cum numero ictuum
              <lb/>
            deprehenduntur in ſequenti Tabula: </s>
            <s xml:id="echoid-s17032" xml:space="preserve">bis modo contigit cunei aciem
              <lb/>
            fuiſſe acuendam, quod fieri adeo ſollicite non potuit, quin quædam
              <lb/>
            immutatio fuerit inducta ſuperficiei, impediens quominus tentamina
              <lb/>
            poſteriora cum prioribus accuratiſſime conveniant; </s>
            <s xml:id="echoid-s17033" xml:space="preserve">ne decipiam,
              <lb/>
            malui defectus annotare, præſtare hoc opinor, quam inani jactan-
              <lb/>
            tia ignaros fallere: </s>
            <s xml:id="echoid-s17034" xml:space="preserve">ecce Experimentorum eventum.</s>
            <s xml:id="echoid-s17035" xml:space="preserve"/>
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