Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              igitur, ſi nihil aliud eſſet, globus quieſceret; at verò ratione impetus
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              noui producti ab alio globo, vel eius impetu, retroagitur. </s>
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            <p id="N20996" type="main">
              <s id="N20998">
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              Theorema
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              72.
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            <p id="N209A4" type="main">
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              Poteſt globus retroagi, licèt in aliud corpus non incidat
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              : hoc eſt vulgare,
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              mirificum tamen experimentum, ſit enim globus ECBL incubans
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              plano horizontali MLG, in quem deſcendat planum, quod niſi globi
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              reſiſteret materies, reſecaret ſectionem DHE. </s>
              <s id="N209B5">Dico quod ab iſto ictu
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              globus determinabitur ad duos motus, alterum centri K verſus A, alte­
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              rum orbis puncti D ſcilicet, vel C verſus E, ita vt initio motus centri
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              præualeat verſus A, qui citò deſtruitur propter affrictum partium plani; </s>
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              vnde remanet tantùm motus orbis, quo ſcilicet globus rotatur verſus F; </s>
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              nec eſt alia ratio huius experimenti, in quo habetur quædam reflexio ſi­
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              ne corpore reflectente: pro quo obſerua fore vt experimentum meliùs
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              ſuccedat, ſi cadat ictus propiùs ad punctum C, quia diutiùs voluitur
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              orbis. </s>
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            <p id="N209CF" type="main">
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                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              73.
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              </s>
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              Hinc etiam ratio euidentiſſima alterius experimenti, quod valdè familiare
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              eſt iis, qui breuioribus globulis ludunt
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              ; </s>
              <s id="N209EA">ſi enim ita proiiciatur per medium
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              aëra globulus, vt eius hemiſphærium ſuperiùs moueatur contrario motu
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              motui centri, vel vt Aſtronomi loquuntur in Antecedentia, vbi globulus
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              terræ planum attingit, vel illico conſiſtit, vel retroagitur, niſi aliqua
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              portio plani inæqualis aliò reflectat; </s>
              <s id="N209F6">cuius rei ratio eſt duplex ille mo­
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              tus, quorum ſi determinatio æqualis eſt, conſiſtit globus; </s>
              <s id="N209FC">ſi verò determi­
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              natio motus orbis ſit maior, quod ſemper accidit in breuiore ictu; certè
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              cum præualeat, globum retroire neceſſe eſt. </s>
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            <p id="N20A04" type="main">
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              Theorema
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              74.
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              </s>
            </p>
            <p id="N20A12" type="main">
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              Globulus eburneus in alium impactus conſistit quidem ſi centrum respicias
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              ; </s>
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              at verò ſæpè accidit globulum circa centrum ſuum immobile motu cir­
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              culari & horizontali ad inſtar vorticis conuolui; </s>
              <s id="N20A24">cuius effectus ratio eſt,
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              quia cùm prior impetus ideo tantùm deſtruatur, quia eſt fruſtrà, & fru­
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              ſtrà eſt, quia æqualis eſt determinatio vtraque per lineas oppoſitas, de­
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              terminatio inquam motus centri; </s>
              <s id="N20A2E">ſi tamen globi deficiat æquilibrium, vt
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              ſemper reuerâ tantillùm deficit, in partem illam globus voluitur, vt vide­
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              mus in corpore oblongo, cuius dum vna extremitas pellitur circa cen­
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              trum aliquod voluitur; </s>
              <s id="N20A38">ſed de motu circulari infrà; ſed tantiſper ſphæ­
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              riſterium ingredi placuit, vt alios effectus motus reflexi demon­
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              ſtremus. </s>
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            <p id="N20A40" type="main">
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              Theorema
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              75.
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              </s>
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            <p id="N20A4E" type="main">
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              Cum pila coniicitur in parietem ad latus, reſilit in pauimentum, vnde ite­
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              rum repercutitur fallente ſaltu
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              ; </s>
              <s id="N20A5B">ratio eſt clara, quia quadruplici quaſi
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              motu mouetur pila in vltimo ſaltu; </s>
              <s id="N20A61">Primus eſt motus centri bis reflexus; </s>
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