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

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              <s id="id.000056">
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              odoris. </s>
              <s id="id.000057">Debent & poruli analogici in iis, quæ
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              ab ipſis peruaduntur rebus; vt exemplis
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              oſtenditur.
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              p.50. </s>
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            <p type="main">
              <s id="id.000058">
                <emph type="italics"/>
              XIV. </s>
              <s id="id.000059">Difficultas præcipua; quomodo attra­
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              ctio ferri à Magnete per emiſſa corpuſcula
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              fiat: Fieri fortè radiis iugi illorum corpuſcu­
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              lorum emißione creatis, refractiſque in re
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              attracta verſus perpendicularem: vnde &
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              factis angulis, quaſi cubitis, in ferro, com­
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              preßio, & attractio in magnetem ſequatur.
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              </s>
              <s id="id.000060">Rationem quorundam effectuum heinc red­
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              di, & actionem electricorum poſſe exinde
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              intelligi.
                <emph.end type="italics"/>
              p.54. </s>
            </p>
            <p type="main">
              <s id="id.000061">
                <emph type="italics"/>
              XV. </s>
              <s id="id.000062">Vis Terræ attractrix, perinde ac vis
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              magnetis exſeritur. </s>
              <s id="id.000063">Propè, quàm procùl, ma­
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              ior. </s>
              <s id="id.000064">Lapis in ſpatiis imaginariis conſtitutus
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              tam conſtante mundo, quàm non exſtante, ibi
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              quieſceret. </s>
              <s id="id.000065">Etiam in medio aeris ſpatio, ſi
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              fieret penitùs inane. </s>
              <s id="id.000066">Mouetur iam, quia tra­
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              hitur. </s>
              <s id="id.000067">Ingens ſaxum, cohibita attractione,
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              facillimè mobile. </s>
              <s id="id.000068">Motus deorsùm initio len­
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              tißimus. </s>
              <s id="id.000069">Vis proiecto impreſſa ideò debili­
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              tatur, quòd attractio à Terra facta ipſam
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              continenter refringat. </s>
              <s id="id.000070">Quare pondera ſeu
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              magna, ſeu parua (eiuſdem præſertim ma­
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              teriæ) æqua velocitate cadunt.
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              p.58. </s>
            </p>
            <p type="main">
              <s id="id.000071">
                <emph type="italics"/>
              XVI. </s>
              <s id="id.000072">Impreſſus ſemel motus illi lapidi in
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              imaginariis ſpatiis conſtituto foret æquabi­
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              lis, & perpetuus, attractionis refringentis
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              defectu. </s>
              <s id="id.000073">Comprobatur ex dictis de æquabili­
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              tate motus horizontalis, & ex conſtantia
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              motus rei penſilis, cuius excurſus, & recur­
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              ſus præcipue ob ſolam ipſius chordæ, par­
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              tium ve eius quaſi ſarcinulas ſensìm re­
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              fringuntur, ac denique ceſſant.
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              p.62. </s>
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            <p type="main">
              <s id="id.000074">
                <emph type="italics"/>
              XVII. </s>
              <s id="id.000075">Poteſt ſimplex Terræ attractio &
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              emonere lapidem à quiete in aëre, & ſuperæa
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              re reſiſtentiam ſuppoſiti aëris. </s>
              <s id="id.000076">Si mobile vno
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              ictu pulſum, pluribus ſimilibus continenter
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              pulſetur, ipſius velocitas continenter auge­
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              bitur. </s>
              <s id="id.000077">Lapis in aere, ſeu à Terra, ſeu ab aëre,
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              ſeu ab vtroque continenter ictus accipiat,
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              non poteſt continuò non accelerari. </s>
              <s id="id.000078">Si ab al­
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              tera, ſimplicive tantum cauſa moueretur,
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              velocitas eius increſceret ſecundum ſeriem
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              vastatum. </s>
              <s id="id.000079">Atqui increſcit ſecundum ſe­
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              riem numerorum ab vnitate imparium.
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              p.66.
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              </s>
            </p>
            <p type="main">
              <s id="id.000080">
                <emph type="italics"/>
              XVIII. </s>
              <s id="id.000081">Coniungenda ut
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              aque cauſa: vt
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              ſit in primo momento unus ictus à Terra at­
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              trahente: in ſecundo ſint duo, vnus à Ter­
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              ra attrahente, alius ab aere impellente, &
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              conſequenter ſingulis momentis duo: ſicque,
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              cum impetus omnes maneant, ſint in primo
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              momento, 1. in ſecundo 3. in tertio 5. & quæ
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              eſt progreſsio numerorum imparium. </s>
              <s id="id.000083">Heinc
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              ſequitur ſpatia in fine cuiuſque momenti ab
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              vſque initio qua ſita eſſe 1. 4. 9. & c. quæ
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              ſunt quadrata momentorum. </s>
              <s id="id.000085">Declaratur res
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              ſchemate. </s>
              <s id="id.000086">Cur graue proiectum tanto aſcen­
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              dat tempore, quanto deinceps deſcendit. </s>
              <s id="id.000087">Ea­
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              dem proportio ſeruatur in rebus obliquè de­
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              cidentibus: & in excurſibus, recurſibuſque
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              rerum penſilium. </s>
              <s id="id.000088">An caſurus fuerit eadem
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              incrementi velocitatis proportione demiſſus
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              in centrum lapis à Terræ ſuperficie, à luna,
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              à Sole, à Fixis?
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              p.69. </s>
            </p>
            <p type="main">
              <s id="id.000089">
                <emph type="italics"/>
              XIX. </s>
              <s id="id.000090">Vis motrix in re proiecta non aliud,
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              quàm impreſſus motus, qui ex ſe in eo perſe­
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              ueraret perpetuò, niſi facta à Terra attra­
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              ctione labefactaretur. </s>
              <s id="id.000091">Imprimitur, dum mo­
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              uens iunctum mobili ipſum ſecum monet, &
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              aliquo vſque in viam tenendam comitatur.
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              </s>
              <s id="id.000092">Motus reflexus cum directo continüatus, ab
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              eadem cauſa cum illo eſt. </s>
              <s id="id.000093">Reflexio, & inci­
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              dentia ad angulos pareis, eadem lege, qua
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              emerſio, & procidentia in re penſili.
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              p.74. </s>
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            <p type="main">
              <s id="id.000094">
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              XX. </s>
              <s id="id.000095">Differtur tractatio de argumento ex
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              motu verum ſurſum proiectarum reciden­
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              tiumque ad quietem Terræ aſſerendam aſ­
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              ſumpto, in occaſionem aliam. </s>
              <s id="id.000096">Epiſtola con­
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              cluditur.
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              p 77. </s>
            </p>
            <p type="main">
              <s id="id.000097">
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              EPISTOLÆ POSTERIORIS.
                <emph.end type="center"/>
              </s>
            </p>
            <p type="main">
              <s id="id.000098">
                <emph type="italics"/>
              I. PRoponitur agendum de imbecillitate
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              argumenti, quo ab Ariſtotele vſque
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              probatur Terram quieſcere. </s>
              <s id="id.000099">Seneca rem diſ­
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              quiſitione non indignam cenſuit, moueatur­-
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              ne Terra, an-non. </s>
              <s id="id.000100">Plato eam moueri opina­
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              tus eſt. </s>
              <s id="id.000101">Argumentum vulgare pro quiete,
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              Quòd lapis ſursùm directè protectus e pup­
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              pi, dum navis mouetur, non recidat in puppim
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              intereà ſubductam. </s>
              <s id="id.000102">Cùm exemplam hoc fal­
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              ſum ſit, videtur argumentum poſſe retor-
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
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