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

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              tiens erat moturum; percutit verò
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              k
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              orbiculum minorem
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              h;
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              movebitur hic ab incipiente & necdum perfectâ plagâ: orbicu­
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              lus ergo
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              k
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              per poriſma 2. motum continuabit. </s>
              <s>Simili modo
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              orbiculi. reliqui
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              g. m. i
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              quia minores quàm
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              k;
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              movebuntur ab
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              impulſu minori: ac proinde à plagâ incipiente: unde huius ex­
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              ceſſus erit principium motûs orbiculi
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              k,
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              DE GYRATIONE ORBICVLI.
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              <s>Si orbiculus percuſſus alium impellat ſibi contiguum & æ­
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              qualem; duplici motu videtur ferri ex illâ plagâ: nimirum
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              recto & circulari. </s>
              <s>Nam cùm A movetur per lineam AI, pun­
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              ctum H in peripheriâ transfertur in F. K &c. </s>
              <s>Quod quidem
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              erit manifeſtum ſi punctum contactûs aliquo ſigno notetur. </s>
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              <s>Huius autem motûs ratio videtur referri ad librationem. </s>
              <s>Nam
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              cùm ex plagâ in G deceſſerit impulſus æqualis PT; neceſse
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              præpondium fieri in K,
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              ita revolui orbiculum circa mobi­
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              le centrum A. </s>
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              Obijcies. </s>
              <s>Si ob librationem circumagitur orbiculus, neceße buius mo­
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              tum eſſe æqualem plagæ. cui æquatur exceſſus in parte oppoſitâ. igitur quò
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              contactui propior diameter, quia tum maior plaga; erit quo〈que〉 circulatio
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              maior: quod tamen non fit. </s>
              <s>Verùm quò maius intervallum, eò arcum
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              deſcribit maiorem. </s>
              <s>Deinde verò ſi duo orbiculi contigui inæqualiter ab­
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              ſint à diametro, cuiuſmodi in LV, circulatio procedit ex H in N. eſt au­
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              tem maior plaga in V quàm in L: oportebat ergo hunc motum fieri ex
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              H in F, ſi illa circulatio proveniret ab exceſſu.
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              <s>Reſpondeo cùm motus hic circularis fluat ab eodem impul­
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              ſu, quem retinet centrum ad ſe movendum; hic autem acceſſu
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              ad diametrum continuò minuatur; neceſsc
                <expan abbr="quoq;">quoque</expan>
              </s>
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