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

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              paralleli HF. DE. </s>
              <s>Dico grauitatem mouentem in H. D eſſe
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              minorem, quàm ſi extra lllud totum mouerentur. </s>
              <s>Cùm enim
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              motus H ſit linea HA, & motus D linea DA per 3. Axioma;
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              erunt HF. DE motus inclinati: </s>
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              <s>Et anguli in clinationum AHF. ADE. </s>
              <s>Igitur pars grauitatis
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              H & D in hypomochlio quieſcit:
                <expan abbr="minorq;">minorque</expan>
              proinde eſt grauitas
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              mouens, quàm ſi extra illud totum mouerentur. </s>
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              COROLLARIVM I.
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              <s>Sequitur grauitatem mouentem partium à centro magis re­
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              motarum eſſe minorem: propterea quòd motus ſint magis in­
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              clinati. </s>
              <s>Nam angulus AIF externus, hoc eſt illi æqualis A
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              DE eſt maior angulo interno AHF. & angulus AKG, hoc eſt
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              ADE maior angulo ACK. </s>
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              COROLLARIVM II.
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              <s>Vnde neceſse partes propiores centro, remotiorum; cen­
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              trum verò omnium eſſe hypomochlium huius grauitatis quie­
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              ſcentis. </s>
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              THEOREMA II.
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              Centrum grauitatis habet impulſum omnium partium grauitati
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              æqualem.
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              <s>Cùm enim moveatur ad motum partium mobilis, habebit
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              impulſum illarum grauitati moventi æqualem. </s>
              <s>Eſt verò
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              idem centrum hypomochlium grauitatis quieſcentis in motu
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              partium eidem parallelo, per Corollarium 2. quæ cùm augeat
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              illius grauitatem, habebit
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              per poſit. 4. impulſum illi æ­
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              qualem. </s>
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