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

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            <p type="main">
              <s>
                <pb xlink:href="063/01/132.jpg"/>
              fiat eiuſdem plani; neceſse ubi ex
                <emph type="italics"/>
              a
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              promovit in
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              g,
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              ipſum
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              b
                <emph.end type="italics"/>
                <lb/>
              revolui in
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              a.
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              Similiter ubi
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              b
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              perventurum eratex
                <emph type="italics"/>
              a
                <emph.end type="italics"/>
              in
                <emph type="italics"/>
              g,
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              ipſum
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                <emph type="italics"/>
              c
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              attinget punctum
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              a.
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              Quòd ſi maior ſit motus circuli, quàm
                <lb/>
              eiuſdem centri; contingit ipſum retroagi. </s>
              <s>Nam cùm ex
                <emph type="italics"/>
              a
                <emph.end type="italics"/>
                <lb/>
              movetur in
                <emph type="italics"/>
              g;
                <emph.end type="italics"/>
              motus in peripheriâ fit per maius
                <expan abbr="ſegmentũ">ſegmentum</expan>
                <emph type="italics"/>
              ab:
                <emph.end type="italics"/>
              ac
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              proinde orbiculus tangit planum in puncto medio inter
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              b
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              &
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              c.
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                <lb/>
              Demum ſi maior ſit motus centri quàm gyrationis; videbitur
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              motus rectus, & punctum
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              b
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              inter
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              a
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              &
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              g.
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              Inde ergo ratio reddi­
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              tur; quòd motus centri ab illatâ plagâ deflectat à lineâ rectâ
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                <emph type="italics"/>
              AI
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              etiam ante grad: 60. </s>
              <s>Cùm enim motus orbiculi circularis
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              in plano firmetur,
                <expan abbr="eaq;">eaque</expan>
              ratione motui centri reluctetur; ne­
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              ceſſe motum mixtum inde procreari. </s>
            </p>
            <figure id="id.063.01.132.1.jpg" xlink:href="063/01/132/1.jpg" number="37"/>
            <p type="main">
              <s>
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              De Levigatione & Politura.
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              </s>
            </p>
            <p type="main">
              <s>COrpora polita dicuntur, quæ ſuperficiem habent illius fi­
                <lb/>
              guræ, quâ terminantur, æquabilem: ut in cubo perfectè
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              planam, in globo ſphæricam. </s>
              <s>His opponitur aſperum ſeu ſca­
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              brum: cuius ſuperficies partes habet inæqualiter ſitas, magis
                <lb/>
              & minùs depreſſas aut elevatas. </s>
              <s>
                <expan abbr="Neq;">Neque</expan>
              omnia corpora æqua­
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              liter: ſed alia magis, alia minùs, alia nullâ induſtriâ poliuntur:
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              ut thophus, pumex, ſuber, panni lanei &c. </s>
              <s>Et cùm ſcabrities
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              ſeu inæqualitas à duobus proveniat: cùm vel partes inſunt
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              verrucoſæ, vel pori ſeu cavernulæ ſuperficiem perforantes,
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              quantum vis ſenſum lateant: polituram obtinemus contrariâ
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              affectione: verrucarum quidem, & quæ prominent, ablatione:
                <lb/>
              ſpatiorum verò inanium repletione. </s>
              <s>Quòd ſi eiuſmodi um­
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              bilici & verruculæ tolli nequeant: aut lacunæ expleri, impo­
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              libile dicetur corpus, Talia ſunt
                <foreign lang="grc">ἀπιε
                  <gap/>
                ὰ</foreign>
              , & quæ dividi neque­
                <lb/>
              unt in partes minimas: quia
                <expan abbr="neq;">neque</expan>
              compreſſioni cedunt ad po­
                <lb/>
              rum ſolidandum, receptâ in eas vacuitates parte magis preſsâ: </s>
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          </chap>
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