Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

Table of figures

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[181. Figure]
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[183. Figure]
[184. Figure]
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[186. Figure]
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              dinum earumdem, numquam tamen cuitari poteſt
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              cylindrorum agitatio, & oſcillatio lateralis dum a­
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              ſcendunt, vel deſcendunt, neque eorum axes omninò
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              ſimili poſitione moueri poſſunt, & hinc enormes va­
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              rietates oriuntur; officit quoque agitatio partium̨
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              eiuſdem aquæ quæ euitari ne quit, dum manus infrą
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              aquam immerſæ emittere cylindros debent. </s>
              <s id="s.002569">Hiſcę
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              difficultatibus territus, vt
                <expan abbr="quã">quam</expan>
              maximè obſtacula ef­
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              fugerem, elegi ſphærulas ex eodem ligno, aut ex
                <expan abbr="plũ-bo">plum­
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                bo</expan>
              confectas, in quibus ob ſimilitudinem figurarum̨
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              in qualibet earum circumuolutione oſcillationes non
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              impediunt quin ſemper ſimili poſitione pilæ aſcen­
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              dant, vel deſcendant, & tunc ex repetitis ex perimen­
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              tis conſtat quod velocitates earum reuera inæquales
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              ſunt, celeriorique motu maior pila fertur, quàm mi­
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              nor, ſed in minori proportione, quàm ſit ſubduplica­
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              ta altitudinum, vt noſtra theoria ſuadere videtur.
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            <p type="margin">
              <s id="s.002570">
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              Quia difficul­
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              tèr hæc iņ
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              cylindris ex­
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              periri
                <expan abbr="poſsũt">poſsunt</expan>
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              ſed faciliùs,
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              & rariùs in
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              ſphæris iņ
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              ijs noſtra
                <expan abbr="sẽ-tentia">sen­
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                tentia</expan>
              com­
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              probatur.</s>
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            <p type="margin">
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              Cap. 11. gra­
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              uia in fluido
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              velocitati­
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              bus inæqua­
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              libus ferri
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              debere.</s>
            </p>
            <p type="margin">
              <s id="s.002572">
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              in valdè ra­
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              ris fluidis va­
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              rietates ali­
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              quæ contin­
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              gunt.</s>
            </p>
            <p type="main">
              <s id="s.002573">Et hæc profectò valent in fluidis conſiſtentibus, &
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              non valdè
                <expan abbr="condẽſabilibus">condenſabilibus</expan>
              , vt eſt aqua, hydrargyrum,
                <lb/>
              oleum, & alia ſimilia, ſed in aere rariſſimo, qui ex ma­
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              chinulis grandioribus, & valdè compreſſibilibus
                <expan abbr="cõ-ſtat">con­
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                ſtat</expan>
              , non nullæ irregularitates contingunt in motioni­
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              bus corporum per eum aſcendentium, vel
                <expan abbr="deſcendẽ-tium">deſcenden­
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                tium</expan>
              ; & hoc non fit eadem regula, ſcilicèt non eodem
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              modo variètur motus
                <expan abbr="ſolidorũ">ſolidorum</expan>
              in principio aſcenſus,
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              vel
                <expan abbr="deſcẽſus">deſcenſus</expan>
              , ac in progreſſu, &
                <expan abbr="cõtinuatione">continuatione</expan>
              prolixa
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                <expan abbr="eorũdẽ">eorundem</expan>
                <expan abbr="motuũ">motuum</expan>
              , vt ſuo loco declarabitur. </s>
              <s id="s.002574">
                <expan abbr="Poſtquã">Poſtquam</expan>
                <expan abbr="cõ-parauimus">con­
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                parauimus</expan>
              velocitates, quibus homogenea corporą
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              aſcendunt, vel deſcendunt in fluidis, expendere vlti-</s>
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          </chap>
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