Gassendi, Pierre, De motu impresso a motore translato epistulae duae, 1642

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              <s id="id.000487">
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              & quidvis aliud cum cæteris; pares difficultates
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              erunt. </s>
              <s id="id.000488">An ergo præter cæterorum conjecturas, di­
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              cere liceat concipi poſſe magneticos radios, ob con­
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              tinentem emiſſionem, eam rigiditatem tueri, vt fiant
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              quaſi virgulæ, aut ſaltem quaſi chordulæ tenſæ?
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              </s>
              <s id="id.000489">Nempe tametſi ex contiguis duntaxat particulis con­
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              ſtent; poteſt nihilominùs continua ſuccedentium ſuf­
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              fectio, indeſinenſque inſtantia, ac vehemens propul­
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              ſio rigiditatem illam creare; vt in aquæ exſilitione
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              per anguſtos tubulos manifeſtum eſt fieri. </s>
              <s id="id.000490">Certè &
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              ipſos lucis radios non videmur poſſe alia ratione
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              concipere, ſiue vibratos, ſiue repulſos? </s>
              <s id="id.000491">An proinde vt
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              lucis radij ex vno quodam puncto prodeuntes, vbi
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              impinguntur in aquæ planitiem, quacúmque occur­
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              runt poruli, meatulique, pertranſeunt (quippe ana­
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              logici ſunt) ſed vnus directè, perpendiculariterve,
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              cæteri refractè, ſeu cum deflexione ad illum; ita
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              radij magnetici, quos in orbem effundi conſtat (tan­
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              quam ex vno centro prodeuntes) vbi impingun­
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              tur in ferrum, quacúmque ipſis poruli, meatulique
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              occurrerint, penetrant (ſcilicet analogici) ſed vnus
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              directe (is nempe, qui per mediam molem, ac velu­
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              ti axem grauitatis traijcitur) cæteri refractè, defle­
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              xéque ad ipſum? </s>
              <s id="id.000492">Quæcúmque certe eſt in aqua ſo­
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              lidiuſcularum particularum diſpoſitio, quæ radio­
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              rum lucis refractionem faciat; eadem radiorum ma­
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              gneticorum, proportione adhibita, facere refractio­
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              nem poteſt. </s>
              <s id="id.000493">An cùm vtrique radij ſolidas particu­
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              las vrgeant, illas nempe, quæ verſus medium, per­
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              pendicularemve ſunt radium, vt pote in quas defle-</s>
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