Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              bili, quod vt breuiter ob oculos ponatur ſit malus nauis mobilis IA,
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              quæ eo tempore, quo corpus graue deſcendit ab A in D motu naturali,
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              percurrit FG æquabili motu, & conſequenter GI æqualem FG eo tem­
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              pore, quo idem corpus graue percurrit DF triplam AD; </s>
              <s id="N1BEB5">igitur globus
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              demiſſus ex A ſuo motu deſcribit Parabolam AEH; quod etiam accidet
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              aſſumpta quacunque altitudine mali vel quocunque ſpatio confecto à
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              naui mobili eo tempore, quo corpus graue motu naturali accelerato
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              conficit ſpatium æquale altitudini mali. </s>
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              <s id="N1BEC3">Octauò, non eſt tamen diſſimulandum, quod etiam non diſſimulauit
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              Merſennus, talem non fore deſcenſum, ſi nauis v. g. eadem cum emiſſa
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              ſagitta, vel exploſa è tormento glande velocitate moueretur; </s>
              <s id="N1BECF">non quod
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              aër vel medium obſiſtat, vt ipſi dicunt; </s>
              <s id="N1BED5">hoc enim iam ſuprà rejecimus; </s>
              <s id="N1BED9">
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              ſed quod major impetus violentus efficiat, vt iam ſuprà dictum eſt, ne in
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              tanta proportione naturalis acceleretur; </s>
              <s id="N1BEE0">quod etiam ſuo boatu intonant
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              tormenta maiora, è quibus horizontaliter directis exploſæ pilæ per plu­
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              ra ſecunda in libero aëre moueantur, licèt os tormenti à plano horizon­
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              tis vix tribus pedibus abſit; </s>
              <s id="N1BEEA">igitur non deſcribunt ſuo motu Parabolas; </s>
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              hinc ſub finem minor eſt ictus; hinc etiam fatetur idem Merſennus ſe­
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              cundum ſpatium horizontale confici tardiore motu quàm primum &
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              tertium quàm ſecundum, atque ita deinceps. </s>
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              Theorema
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              83.
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              </s>
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              Si corpus graue proiiciatur ſurſum perpendiculariter è naui mobili, ſunt tres
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              impetus qui concurrunt ad illum motum
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              ſit enim nauis mobilis per hori­
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              zontalem LF, è qua ſurſum rectâ per lineam perpendicularem LA pro­
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              iiciatur corpus graue; </s>
              <s id="N1BF16">huic certè ineſt triplus impetus, ſcilicet duo vio­
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              lenti, alter per verticalem LA impreſſus à proiiciente; </s>
              <s id="N1BF1C">alter per horizon­
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              talem LF impreſſus à naui; </s>
              <s id="N1BF22">tertius denique naturalis per ipſam perpen­
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              dicularem deorſum LP; </s>
              <s id="N1BF28">igitur tres iſti impetus ſuo modo concurrunt
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              ad motum per Ax.1.certè ſi ineſſent tantùm duo impetus ſcilicet LA, &
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              LF, motus fieret per inclinatam rectam LC; </s>
              <s id="N1BF30">vel ſi tantùm duo LP, &
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              LA fieret per ipſam LA motus retardatus; </s>
              <s id="N1BF36">vel ſi LF & LP fieret per
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              curuam deorſum, vt conſtat ex dictis; igitur per aliam lineam fieri de­
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              bet ad quam tres illi impetus concurrunt. </s>
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            <p id="N1BF3E" type="main">
              <s id="N1BF40">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              84.
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              </s>
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            <p id="N1BF4C" type="main">
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              Tam pugnat impetus naturalis per LP cum verticali LA quando eſt con­
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              junctus cum horizontali LF, quàm cum nullus eſt horizontalis,
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              probatur,
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              quia ſemper mobile deorſum trahit, vt patet. </s>
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            <p id="N1BF5A" type="main">
              <s id="N1BF5C">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              85.
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              </s>
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            <p id="N1BF68" type="main">
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              Hinc naturalis eſt æquabilis, & violentus ſurſum eſt retardatus; </s>
              <s id="N1BF70">horizon­
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              talis verò eſt æquabilis ſaltem æquiualenter
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              ; </s>
              <s id="N1BF79">quia cum illo non pugnat ho­
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              rizontalis, in aſcenſu ſaltem perinde ſe habet; </s>
              <s id="N1BF7F">immò cum illo conuenit
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              ad deſtruendum violentum ſurſum, id eſt ad deflectendum deorſum
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              mobile vt conſtat; </s>
              <s id="N1BF87">igitur hic motus conſtat ex naturali & horizontali </s>
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