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

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              <s id="s.001992">
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              Ad hoc, illud imprimis dico, diſtinguendam eſſe
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              in re graui attractionem ſimplicem à compoſita, ſeu
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              adiectitia, aëris
                <expan abbr="etiã">etiam</expan>
              ſollicitatione coniuncta Ex prio­
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              re nempe eſt grauitas ſimplex, quæ lapidi competit,
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              vbicumque ſit, & dum accipitur extra morum: ex po­
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              ſteriore compoſita, quæ eidem lapidi, dum mouetur,
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              competit, & tanto quidem maior, quantò fuerit mo­
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              tus vehementior. </s>
              <s id="s.001993">Deinde dico, debere quidem attra­
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              ctionem ſimplicem eſſe fortiorem propè, quàm procùl:
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              verùm diſcrimen inſenſile eſſe, nec poſſe agnoſci, niſi
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              in diſtantia, intercapedineve multorum milliarium. </s>
              <s id="s.001994">Vt
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              enim, cùm ſit vniuersè verum tractionem ferri à Ma­
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              gnete eſſe fortiorem propè, quàm procùl, inobſerua­
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              bile tamen eſt diſcrimen, niſi interualla attractionis
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              per palmos, aut ſaltem digitos ſumantur; quandò ſi aſ­
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              ſumas per milleſimas, aut centeſimas, imò decimas
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              parteis digiti, nulla eſt diligentia, qua internoſci quid­
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              quam poſſit: ita cùm verum fuerit trahi à Terra lapi­
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              dem tantò potentiùs, quantò propinquiùs, tantò debi­
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              liùs, quantò remotiùs; obſeruari quidem poterit diſ­
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              crimen, ſi interualla accipias tanta, quanta, exempli
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              gratiâ, eſt, ipſiuſmet Terræ ſemidiameter: at ſi accipias
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              interuallum, quod ſemi-diametro minus ſit, non
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              eſt, cur poſſe fieri diſcrimen ſenſibile ſperes. </s>
              <s id="s.001995">Nempe,
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              ſi Terram admiſeris eſſe Magnetem quemdam ingen­
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              tem, vides profectò, ſi vel ad ipſam vſque Lunam,
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              Terræ virtutem extenderis, virtutem Magnetis longè
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              ſenſibiliùs per digitos decreſcere, quàm Telluris virtus
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              per ſemidiametros decreſcat: quippe cùm nullum Ma­
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              gnetem videas, qui attrahat ferrum è tot digitis, quot </s>
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        </body>
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