Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              ex qua priùs deſcenderat dixi ferè, quia cum innatus ſit perfectior vlti­
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              mo acquiſito paulò plùs ſpatij acquiritur in deſcenſu, quàm in aſcenſu,
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              ſed minimum eſt ſenſibile. </s>
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            <p id="N1E539" type="main">
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              Theorema
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              76.
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              </s>
            </p>
            <p id="N1E547" type="main">
              <s id="N1E549">
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              Hinc æqualibus temporibus aſcendit ferè ab F in N, & deſcendit ex M
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              in F,
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              quia numerus terminorum æqualis eſt numero inſtantium. </s>
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            <p id="N1E553" type="main">
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              Theorema
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              77.
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              </s>
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            <p id="N1E561" type="main">
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              Hinc motum haberet ferè perpetuum ab M in F ab F in N, ab N ite­
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              rum in F, &c.
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              ſi enim deſcendens ex M in F aſcendit ad æqualem altitu­
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              dinem FN, ita & deſcendens ex N in F aſcendet ad æqualem altitudi­
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              nem FM, atque ita deinceps; </s>
              <s id="N1E572">igitur motus erit ferè perpetuus; </s>
              <s id="N1E576">ſed pro­
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              fectò nullum eſt corpus tàm læuigatum, quod motum non impediat: dixi
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              ferè, quia deſcenſus tantillùm ſuperat aſcenſum, ſed vix intra mille an­
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              nos ſenſu id percipi poſſet. </s>
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            <p id="N1E580" type="main">
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                <emph type="center"/>
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              Theorema
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              78.
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              </s>
            </p>
            <p id="N1E58E" type="main">
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              Hinc ſi terrestris globus eſſet perforatus in perpendiculo FAI, ſi ex puncto
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              F demitteretur globus plumbeus per FAI deſcenderet ex F in A, tum ex
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              Aaſcenderet in I æquali ferè tempore
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              ; </s>
              <s id="N1E59D">quod neceſſariò ſequitur ex dictis; </s>
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              quia omnes gradus qui concurrent ad aſcenſum, etiam concurrerent ad
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              deſcenſum, præter vnum, ſcilicet vltimo inſtanti deſcenſus acquiſitum; </s>
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              & omnes, qui concurrerent ad deſcenſum, concurrerent etiam ad aſcen­
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              ſum præter vnum, ſcilicet primum vel innatum; </s>
              <s id="N1E5AF">igitur æquale ſpatium
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              æquali tempore percurreretur; </s>
              <s id="N1E5B5">quod certè dictum ſit abſtrahendo à re­
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              ſiſtentia aëris, quæ fortè modica eſſet; </s>
              <s id="N1E5BB">Ex hac perpetua vibrationum ſe­
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              rie aliquando explicabimus cauſas phyſicas apogæi & perigæi Solis, &
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              aliorum planetarum; adhibe
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              cautionem, de qua ſuprà. </s>
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            <p id="N1E5C7" type="main">
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                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              79.
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              </s>
            </p>
            <p id="N1E5D5" type="main">
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              Si duo plana inclinata faciunt angulum eſt ferè æqualis aſcenſus deſcenſui.
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              v. </s>
              <s id="N1E5E0">g. deſcendat per LF dico quod aſcendet per FR ad altitudinem ferè
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              æqualem LF, quia licèt in angulo illo LFR ſit noua determinatio ad
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              nouam lineam motus, id eſt quaſi reflexio; </s>
              <s id="N1E5EA">nihil eſt tamen quod deſtruat
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              impetum; nam in reflexione ſeu noua determinatione non perit aliquid
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              impetus neceſſariò vt lib. ſequenti demonſtrabimus. </s>
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            <p id="N1E5F2" type="main">
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              Theorema
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              80.
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              </s>
            </p>
            <p id="N1E600" type="main">
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              Eſt tamen alia ratio de motu funependuli quâ euincemus aſcenſum eſſe mi­
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              norem deſcenſu,
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              de qua infrà. </s>
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            <p id="N1E60C" type="main">
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                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              81.
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              </s>
            </p>
            <p id="N1E61A" type="main">
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              Initio aſcenſus per FN deſtruuntur gradus impetus producti ſub finem de­
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              ſcenſus, & ſub finem aſcenſus destruuntur producti initio deſcenſus:
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              ratio eſt
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              clara, quia producti ſub finem deſcenſus ſunt imperfectiores, cùm plùs
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              recedant à perpendiculari, per Th. 55. ſimiliter initio aſcenſus longiùs
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              recedit linea à verticali; </s>
              <s id="N1E62D">igitur minùs deſtruetur impetus, vt ſæpè incul-</s>
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