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

Table of Notes

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              <pb o="654" file="0670" n="671" rhead="INTRODUCTIO AD COHÆRENTIAM"/>
            ris paribus poterit maſia plus ponderis prementis ſuſtinere, minusque
              <lb/>
            introrſum & </s>
            <s xml:id="echoid-s16543" xml:space="preserve">extrorſum cedet, quam ſi fuerit conflata ex partibus
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            admodum irregularis figuræ, & </s>
            <s xml:id="echoid-s16544" xml:space="preserve">valde quam inordinato modo ſibi
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            accumulatis.</s>
            <s xml:id="echoid-s16545" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16546" xml:space="preserve">Hinc reſiſtentia vel firmitas corporum compreſſorum non pen-
              <lb/>
            debit tantum â denſitate ſive inde orta gravitate corporum, ſed
              <lb/>
            etiam a partium eorum magis minuſve ordinata figura, & </s>
            <s xml:id="echoid-s16547" xml:space="preserve">accumu-
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            latione.</s>
            <s xml:id="echoid-s16548" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16549" xml:space="preserve">Si proinde corpus conſtet ex partibus inordinatæ figuræ, inor-
              <lb/>
            dinato ſitu congeſtis, tum compreſſione magna cedent introrſum
              <lb/>
            & </s>
            <s xml:id="echoid-s16550" xml:space="preserve">extrorſum, incurvabuntur, inflectentur, auctâque compreſſio-
              <lb/>
            ne rumpentur in medio, ubi maxime inflectuntur, vel in loco mi-
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            nime omnium Cohærenti.</s>
            <s xml:id="echoid-s16551" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s16552" xml:space="preserve">Antequam ad Experimenta accedam, primo machinam deſcri-
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            bam, cujus ope peracta ſunt: </s>
            <s xml:id="echoid-s16553" xml:space="preserve">proſtat depicta in Tab. </s>
            <s xml:id="echoid-s16554" xml:space="preserve">XXVII. </s>
            <s xml:id="echoid-s16555" xml:space="preserve">fig.
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            </s>
            <s xml:id="echoid-s16556" xml:space="preserve">16. </s>
            <s xml:id="echoid-s16557" xml:space="preserve">Compoſita fuit ex duobus aſſeribus A A, B B, ligni Quercici,
              <lb/>
            quadratis, quorum ſingula latera ſunt 17 pollicum Rhenol, infimo
              <lb/>
            aſſeri B B infixa ſunt accurate perpendiculariter quatuor ſtyli C, C,
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            C, C, viginti pollices longi, juxta quos aſſer ſuperior A A libere
              <lb/>
            ſurſum deorſumque adſcendit, cui eum in finem 4 foramina in-
              <lb/>
            ſculpta fuerunt, ut aſſer A A ſemper perpendiculariter ad horizontem
              <lb/>
            poni poſſet, quatuor ſtylis C C C C inſculptæ ſunt diviſiones, ean-
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            dem diſtantiam ab aſſere infimo B B iudicantes: </s>
            <s xml:id="echoid-s16558" xml:space="preserve">In medio aſſeris
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            A A ſed in ſuperficie inferiori, quoque in media ſuperficie ſuperiori
              <lb/>
            aſſeris B B ad D foveola erat, partim ut medium cognoſceretur
              <lb/>
            ſemper, partim ut ligna examinanda melius in medio poni ſerva-
              <lb/>
            rique poſſent: </s>
            <s xml:id="echoid-s16559" xml:space="preserve">ſuperficiei ſuperiori aſſeris A A inſcripti fuerunt ali-
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            quot circuli concentrici, quorum commune centrum erat medium
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            aſſeris, reſpondens quoque medio foveolæ deſcriptæ; </s>
            <s xml:id="echoid-s16560" xml:space="preserve">hi duceban-
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            tur circuli, ut pondera æqualia in eadem diſtantia a centro poni
              <lb/>
            poſſent; </s>
            <s xml:id="echoid-s16561" xml:space="preserve">cumque præterea diametri aliquot circulos ſecabant, bi-
              <lb/>
            narum diametrorum extremitatibus impoſitis ponderibus æquali-
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            bus, ſemper premebatur aſſer A A æquabiliter deorſum, & </s>
            <s xml:id="echoid-s16562" xml:space="preserve">facili
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            artificio horizontaliter ſervari poterat: </s>
            <s xml:id="echoid-s16563" xml:space="preserve">Ligna, examinata intra
              <lb/>
            utrumque aſſerem A A, B B, poſita fuerunt perpendiculariter ad ho-
              <lb/>
            rizontem, pondera P, P, impoſita fuerunt ſemper ita, ut </s>
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