Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              cum deorſum mobile proiicitur, quàm cum ſua ſponte ex eadem altitu­
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              dine deſcendit; certè ni fallor cum ratio demonſtratiua pro hac ſen­
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              tentia faciat, non dubitaui ampliùs priorem ſententiam immutare. </s>
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            <p id="N1B8B9" type="main">
              <s id="N1B8BB">Porrò ratio, quæ pro hac ſententia facit, remque ipſam euincit, talis
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              eſt; </s>
              <s id="N1B8C1">certum eſt impetum violentum deſtrui à naturali aliquando in ma­
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              iori, aliquando in minori proportione, vt conſtat ex dictis; </s>
              <s id="N1B8C7">illa autem,
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              ſeu maior, ſeu minor proportio aliam regulam non habet præter illam
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              quam toties inculcauimus, id eſt impetum deſtrui pro rata, id eſt qua
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              proportione eſt fruſtrà, id eſt qua proportione eſt minor motus eo, qui
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              eſſet ab vtroque impetu ſi ad
                <expan abbr="eãdem">eandem</expan>
              lineam vterque determinatus eſſet
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              atqui cum proiicitur mobile deorſum, vterque impetus ad
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              li­
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              neam eſt determinatus; </s>
              <s id="N1B8DF">igitur nihil motus deeſt per Th.138.l.1. igitur
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              nihil impetus eſt fruſtrà; igitur nihil impetus illius deſtruitur. </s>
            </p>
            <p id="N1B8E5" type="main">
              <s id="N1B8E7">Quod dictum eſſe velim non conſiderata medij reſiſtentiâ, quæ certè
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              aliquid impetus deſtruit, quod tamen inſenſibile eſt in medio libero, pu­
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              tà in aëre; </s>
              <s id="N1B8EF">ſi enim inſenſibilis eſt hæc reſiſtentia in motu naturali; </s>
              <s id="N1B8F3">dum
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              mobile ſit eius ſoliditatis, quæ ſuperet facilè vim aëris; certè etiam in­
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              ſenſibilis eſt in motu proiectorum, præſertim in mediocri ſpatio, eſt
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              enim par vtrobique ratio. </s>
            </p>
            <p id="N1B8FD" type="main">
              <s id="N1B8FF">Equidem fateor in longiſſimo ſpatio poſſe tandem deſtrui totum im­
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              petum violentum; </s>
              <s id="N1B905">nam ſi aliquid in dato ſpatio deſtruitur; </s>
              <s id="N1B909">igitur in ma­
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              iore piùs deſtruitur; </s>
              <s id="N1B90F">atque ita deinceps, donec tandem totus deſtructus
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              ſit; at verò in iis altitudinibus, ex quibus corpus deorſum proiicere poſ­
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              ſumus, vix quidquam facit prædicta reſiſtentia. </s>
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              <s id="N1B919">Nec eſt quod aliquis dicat ab hac reſiſtentia non deſtrui impetum
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              naturalem in motu naturaliter accelerato, vt dictum eſt in ſecundo lib. </s>
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              Igitur nec deſtrui violentum; </s>
              <s id="N1B923">nam qua proportione creſcit medij reſi­
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              ſtentia, creſcunt vires impetus, qui perpetuò augetur; </s>
              <s id="N1B929">vnde cum
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              remaneat ſemper eadem reſiſtentiæ proportio ſicut primo tempore mo­
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              tus impedit hæc reſiſtentia, ne tantillùm impetus producatur; </s>
              <s id="N1B931">ita ſecun­
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              do tempore impedit ne tantillùm æquale producatur; </s>
              <s id="N1B937">igitur nihil pro­
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              ducti impetus ab illa deſtruitur propter augmentum continuum: </s>
              <s id="N1B93D">at ve­
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              rò cum impetus violentus non intendatur; </s>
              <s id="N1B943">certè ſi tantillùm illus perit,
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              primo vel ſecundo inſtanti motus, propter medij reſiſtentis, tantillùm
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              æquale ſingulis temporibus æqualibus deſtruitur; igitur cum infinitus
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              non ſit poſt longiſſimum ſpatij tractum totus tandem deſtruetur vio­
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              lentus ſolo ſuperſtite naturali. </s>
            </p>
            <p id="N1B94F" type="main">
              <s id="N1B951">Hinc fortè ſagitta ex notabili altitudine minùs ferit; </s>
              <s id="N1B955">quia materia illa
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              lignea, & plumea, ex qua conſtat, multùm ab aëre reſiſtente accipit de­
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              trimenti: </s>
              <s id="N1B95D">adde quod licèt initio deorſum rectà emittatur; </s>
              <s id="N1B961">attamen mini­
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              mo aëris flatu declinat tantillùm obliqua; hæc verò obliquitas maximam
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              ictus vim infringit, & conflictus impetuum quaſi ipſum ictum diſtrahit,
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              quod facilè probabis, ſi modico ferè tactu cadentem perpendiculariter
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              ſagittam à ſuo tramite deturbes. </s>
            </p>
            <p id="N1B96D" type="main">
              <s id="N1B96F">Dices, etiam in glande è tormento exploſa hoc ipſum cernitur </s>
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