Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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              diducantur? Ita enim fornices onera videmus ſuſtinere, &
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              contra niti: quòd ſi à parte internâ ſeu cavâ urgeantur; fatiſce­
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              re & diſſolvi. </s>
              <s>Cùm ergo cranium in modum fornicis ſit re­
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              ductum; non facilè à plagâ ab extra incidente diſſolui poteſt:
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              parte verò oppoſitâ, quia impetus extra fertur,
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              à centro
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              perpendicularis, nihil mirum diſſolvi illam continuitatem. </s>
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              <s>Accedit quòd impulſus, facto principio motûs à plagâ, non
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              conquieſcit in parte oppoſitâ; cuius violentia ad maius inter­
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              vallum deſtinatur. </s>
              <s>Cùm
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              reflecti ſit neceſſe: & pars ſi­
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              niſtra dextrorſum, hæc ſiniſtrorſum abeat; in illâ motuum con­
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              trarietate, partibus à ſe divulſis accidit fiſſura. </s>
              <s>Simili modo
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              res habetin vitro à baſi circulari in conum faſtigiato. quæ pla­
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              no æqualiter alliſa abrumpit pedamentum: propterea, quòd
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              impetus à latiſſimâ parte incipiens,
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              reforbens, ab interſe­
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              ctione in cono factâ, rurſum in diuerſa abit. </s>
              <s>Licet verò im­
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              pulſus naturâ ſuâ lineam rectam ſequatur; pro ratione tamen
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              ſubiecti illam rectitudinem variè,
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              interdum circulo per­
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              mutat. </s>
              <s>Et ſi quidem illa corpuſcula, quibus corpora inte­
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              xuntur, continuâ ſerie ſe excipiant, impulſus nullibi offendit:
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              ſed per atomos uniformes ſe circumagens non niſilongâ mo­
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              râ conſeneſcit. </s>
              <s>At cùm figurâ & ſitu à ſe differunt: quia mil­
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              le modis diſcerpi contingit, citò emoritur. </s>
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                <expan abbr="Atq;">Atque</expan>
              ex his vide­
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              tur manifeſtum, quâ ratione impulſus à parte cranij percuſsâ
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              circumgyrando,
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              obviam factus in parte oppoſitâ rimam
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              agat. </s>
              <s>Quia tamen os cranij non inane & vacuum, ſed cere­
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              bro,
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              vaſis in eo contentis eſt refertum, illa ſimilitudo
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              à vitro deſumpta non videtur hic convenire. </s>
              <s>Et cùm impul­
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              ſus naturâ ſuà rectitudinem ſequatur; quid cauſæ quòd in ce­
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              rebrum non rectâ feratur; ſed per ambages in oſſe cranij ober­
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              rat? Et ſi ita; an non neceſſe ex illâ vehementiâ ictûs plura e­
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              iuſdem vaſa diſcerpi & collidi? Pro quo notandum naturam </s>
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