Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              mittuntur plumæ, plumas ipſas præit propter rationem prædictam; </s>
              <s id="N25A78">nam
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              aëra faciliùs diuidit; </s>
              <s id="N25A7E">ſecundò vertiginem illam habet, de qua ſuprà; </s>
              <s id="N25A82">quia
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              aër quaſi reuerberat,
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              plumas; de hoc motu paulò pòſt agemus. </s>
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            <p id="N25A8D" type="main">
              <s id="N25A8F">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              12.
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              </s>
            </p>
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              Cum Cylindrus ita dimittitur, vt altera extremitas motu circulari praeat,
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              remanente initio aliquo centro immobili, deſcendit motu mixto ex recto &
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              circulari
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              ; </s>
              <s id="N25AAA">vt conſtat ex iis, quæ diximus de globo deorſum cadente hoc
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              genere motus; ſunt tamen hîc multa obſeruanda. </s>
              <s id="N25AB0">Primò omnes partes
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              globi initio moueri, ſed inæqualiter, cùm tamen aliqua pars cylindri non
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              moueatur. </s>
              <s id="N25AB7">Sit enim cylindrus AC ita innixus B, vt liberè moueri poſſit; </s>
              <s id="N25ABB">
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              haud dubiè, cùm non ſit æquilibrium, ſegmentum BC præualebit; </s>
              <s id="N25AC0">igitur
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              circa centrum B extremitas C deſcendet per arcum CD, & A per arcum
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              AE; donec tandem punctum B moueatur per rectam BF, ſeu per aliam
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              proximè accedentem, ſi. </s>
              <s id="N25ACA">tantillùm à plano BF repellatur; </s>
              <s id="N25ACE">punctum verò
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              C motu mixto ex recto deorſum, & circulari circa B; </s>
              <s id="N25AD4">ea tamen lege, vt
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              motus orbis nullo modo acceleretur, ſed tantùm motus centri; igitur
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              hic motus conſtat ex motu centri accelerato, & motu orbis quaſi æqua­
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              bili, cuius linea deſcribi poteſt, vt videbimus l. 12. dixi, ferè æquabilem,
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              quia aliquid deſtruitur ſingulis inſtantibus ratione nouæ determinatio­
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              nis, vt diximus ſuprà cum de motu circulari, ſed parùm pro nihilo repu­
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              tatur. </s>
            </p>
            <p id="N25AE6" type="main">
              <s id="N25AE8">
                <emph type="center"/>
                <emph type="italics"/>
              Scholium.
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                <emph.end type="center"/>
              </s>
            </p>
            <p id="N25AF4" type="main">
              <s id="N25AF6">Obſerua 1°. </s>
              <s id="N25AF9">eſſe plures huius motus mixti ſpecies. </s>
              <s id="N25AFC">Primò eſt mixtus
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              ex motu centri & motu orbis æquali. </s>
              <s id="N25B01">Secundo ex 1°. </s>
              <s id="N25B04">maiore & 2°. </s>
              <s id="N25B07">mi­
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              nore. </s>
              <s id="N25B0C">Tertiò ex 1°. </s>
              <s id="N25B0F">minore & 2°. </s>
              <s id="N25B12">maiore. </s>
              <s id="N25B15">Quartò ex 1°. </s>
              <s id="N25B18">accelerato 2°.
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              </s>
              <s id="N25B1C">æquabili Quintò ex 1°. </s>
              <s id="N25B1F">accelerato 2°. </s>
              <s id="N25B22">retardato. </s>
              <s id="N25B25">Sextò ex vtroque retar­
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              dato. </s>
              <s id="N25B2A">Septimò ex vtroque accelerato. </s>
              <s id="N25B2D">Octauò ex 1°. </s>
              <s id="N25B30">æquabili 2°. </s>
              <s id="N25B33">accele­
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              rato.Nono ex 1°. </s>
              <s id="N25B38">retardato 2°. </s>
              <s id="N25B3B">accelerato. </s>
              <s id="N25B3E">Decimò ex 1°. </s>
              <s id="N25B41">æquabili 2°. </s>
              <s id="N25B44">ac­
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              celerato.Vndecimò ex 1°. </s>
              <s id="N25B49">æquabili 2°. </s>
              <s id="N25B4C">retardato &c. </s>
              <s id="N25B4F">nec enim hîc deeſt
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              maxima motuum ſylua, quorum tamen, quia eſt eadem ratio, nimis acu­
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              ratam diſtributionem omittimus, non facilè haberi poteſt; </s>
              <s id="N25B57">cùm enim
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              ſint tres termini, ſcilicet æquabilis, retardatus, acceleratus, erunt 9.
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              combinationes; </s>
              <s id="N25B5F">& cùm ſingulæ tres differentias habeant; nam vel mo­
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              tus orbis eſt æqualis motui centri, vel maior, vel minor, ducantur 9.in 3.
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              & erunt 27. </s>
            </p>
            <p id="N25B67" type="main">
              <s id="N25B69">Obſerua ſecundò centrum motus poſſe vel propiùs accedere ad A
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              v.g.ſi eſſet in G, vel ad C v.g. ſi eſſet Z. ſi primum, maior eſt motus orbis,
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              id eſt velocior, licèt pauciores circuitus fiant; </s>
              <s id="N25B73">quia extremitas C ma­
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              iorem arcum deſcribens plùs temporis in deſcenſu ponit; </s>
              <s id="N25B79">igitur maio­
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              rem velocitatem acquirit; ſi verò ſecundum, è contrario. </s>
            </p>
            <p id="N25B7F" type="main">
              <s id="N25B81">
                <emph type="center"/>
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              Theorema
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              13.
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              </s>
            </p>
            <p id="N25B8D" type="main">
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              Cum cylindrus proijcitur ſurſum it a vt aliquod punctum rectà feratur, cir­
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              ca quod voluitur cylindrus, </s>
              <s id="N25B98">est motus mixtus ex recto centri, & circulari orbis,
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              </s>
            </p>
          </chap>
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