Gassendi, Pierre, De proportione qua gravia decidentia accelerantur, 1646

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              <s id="s.001759">
                <pb pagenum="231" xlink:href="028/01/271.jpg"/>
              cúmque ijs, qui eadem naui conuchuntur appareat) ſed
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              proiicit reuerà obliquè, quatenus & ipſa obliquè mo­
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              uetur, dum agi ſurſum creditur, deflexa putà à motu
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              nauis. </s>
              <s id="s.001760">Et quia proinde vis propria manus, & tranſla­
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              titia nauis ſibi non repugnant, ſed ſeſe veluti inten­
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              dunt, vnam que totalem, fortioremque, quàm ſi ſigilla­
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              tim eſſent, conſtituunt: heinc fieri videtur, vt ſe ſe non
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              deſtruant, ſed vna euadant, quæ tantum ſit alterutrâ
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              fortior, quantum altera fortis eſt. </s>
              <s id="s.001761">Quare & cùm lapis
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              non tendat directè ſurſum, vt ſi à ſola manu proiicere­
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              tur: neque directe ſecundùm horizontem, vt ſi vehere­
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              tur, agereturve à ſolanaui; verùm feratur motu miſto,
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              obliquóve, & deſcribat per aërem, quaſi arcum (ſiue
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              potiùs lineam, quam dicunt parabolicam) cuius chorda,
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              ſeu baſis ſecundum horizontem eſſe intelligatur; & ſa­
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              gitta, ſeu axis ſecundum perpendiculum (prout medium
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              eſt inter aſcenſum, & deſcenſum) Exinde eſt, cur lapis
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              neque minùs altùm, quàm ſi à ſola manu proiiceretur,
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              perueniat: neque minus ptorsùm, quàm ſi à ſola agere­
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              tur naui, quatenus prolixitas lineæ eſt quidem maior,
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              quàm ſimplex aſcenſus, deſcenſuſque ad perpendicu­
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              lum; ſed ad hoc vim ſuppletimpreſſio à naui: & pro­
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              lixior quoque, quàm ſimplex ſecundum horizontem
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              progreſſio; ſed ad hoc vim ſupplet impreſſio à manu.
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              </s>
              <s id="s.001762">Idem verò dicendum eſt de ſemi parabolica linea: vt
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              dum lapis è carcheſio non proiectus, ſed dimiſſus, ad
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              pternam perinde cadit, vt ſi nauis quieſceret: ſiqui­
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              dem ipſi grauitati lapidem adacturæ ſecundùm perpen­
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              diculum, accedit vis nauis, qua manus dimittens inte­
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              rim transfertur, quæque tantumdem impetus addit, </s>
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