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

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              THEOREMA XIII.
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              Si orbiculus æqualis percutiat baſim cylindri orbiculati minùs gra­
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              vem; habeat verò impulſum duplo maiorem gravitate ſecunda; ex­
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              clusâ à cylindro baſi pertranſibit.
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              <s>Nam ſi impulſum habeat æqualem gravitati ſecundæ; per
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              12 huius, ſuccedit in locum baſis à cylindro excluſæ: Cùm igi­
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              tur eadem gravitate detineatur, quâ baſis excluſa; non niſi ab
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              impulſu æquali excludi valebit. </s>
              <s>Vt ergo exclusâ baſi ipſe
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                <expan abbr="quoq;">quoque</expan>
              eluctetur; impulſum habebit duplo maiorem. </s>
              <s>Quòd
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              ſi verò impulſum habeat illâ gravitate maiorem, minorem ve­
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              rò quàm duplum; exclusâ baſi non totus, ſed pro ratione ex­
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              ceſſûs plus, minuùſuè à cylindro prominebit. </s>
              <s>Priuſquam
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              hunc motum orbiculorum finiam; admonere volui, ne quis
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              ab uno experimento obiter facto,
                <expan abbr="neq;">neque</expan>
              niſi omnibus propo­
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              ſitionibus priùs expenſis, facile pronuntiet: cùm hæ inter­
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              dum illas limitent. </s>
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                <expan abbr="Icaq;">Icaque</expan>
              cùm dico orbiculum, ſi alium per­
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              cutiat ſibi æqualem, illo expulſo quieſcere; id non prorſus ve­
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              ritati conſonum videbitur, ſi experimentum fiat in orbiculis
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              magis ponderoſis: cuiuſmodi metallici, ex argento, ferro, ære,
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              plumbo, ſtanno, auro. </s>
              <s>Percuſſo enim æquali non quieſcunt,
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              ſed aliquantulum ex illâ plagâ ſequuntur: idq magis minùſue
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              pro ratione ponderis. </s>
              <s>Quod quidem ad finem theor: 6 monui
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              Quia nimirum rationem cylindri habent eiuſmodi orbiculi:
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                <expan abbr="magiſq;">magiſque</expan>
              ponderoſus æquivalet cylindro longiori. </s>
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                <expan abbr="Itaq;">Itaque</expan>
              diffe­
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              rentia plagæ in his maior; quæ in orbiculis levioribus evane­
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              ſcit, & ob exiguitatem ſenſum latet. </s>
              <s>Idem fit in globis magni
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              ponderis & molis. </s>
              <s>Quia vel centrum gravitatis non eſt idem
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              cum centro molis: vel quòd ſuperficiem minùs ſphæricam
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              habentes non in puncto, ſed parte aliquâ dividuâ ſe tangunt, </s>
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