Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              ſecet arcum CFG ad angulos rectos; idem prorſus fiat in aliis punctis
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              peripheriæ, aſſumptis ſcilicet lineis æqualibus ſubtenſis arcuum, v.g. in
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              puncto D, aſſumpta linea æquali AD, in puncto C, aſſumpta æquali AC,
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              &c. </s>
              <s id="N29FD3">hoc poſito habetur ſolidum, quod facilè vocauerim Elliptico cylin­
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              dricum, cuius conſtructio talis eſt, ſit cylindrus RI, cuius diameter
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              baſis ſit KI, æqualis diametro AF circuli prioris; </s>
              <s id="N29FDB">ſit etiam altitudo KR,
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              æqualis prædictæ diametro KI, ſit KR diuiſa bifariam in L, ſitque pla­
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              num IL ſecans cylindrum, itemque alterum LP, vtraque ſectio Ellipſis
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              eſt, vt patet; </s>
              <s id="N29FE5">ac proinde habetur ſolidum quæſitum LIP conſtans gemi­
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              na baſi LI. & LP Elliptica, & reliqua circumferentià cylindricâ, cuius
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              centrum grauitatis eſt in N, id eſt in puncto decuſſationis rectarum PM,
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              IS, quæ diuidunt ILPL bifariam æqualiter, eſt autem NO 1/3 totius
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              LO, per Sch. Th.2. hoc poſito ſit XF 1/3 totius AF: dico eſſe centrum
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              percuſſionis quæſitum circuli ACFG rotati circa A, quia perinde ſe
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              habet, atque ſi puncto X incubaret prædictum ſolidum ellipticocylindri­
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              cum, cuius X eſſet centrum grauitatis. </s>
            </p>
            <p id="N29FF9" type="main">
              <s id="N29FFB">
                <emph type="center"/>
                <emph type="italics"/>
              Scholium.
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                <emph.end type="center"/>
              </s>
            </p>
            <p id="N2A007" type="main">
              <s id="N2A009">Obſeruabis primò, in plano ACFG, vt punctum X ſit centrum per­
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              cuſſionis, incidendam eſſe ſtriam quamdam, ſeu rimam, quæ termi­
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              netur in X. </s>
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            <p id="N2A011" type="main">
              <s id="N2A013">Secundò, idem eſſe centrum percuſſionis rectæ AF, quæ voluitur
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              circa A, ſiue ſit ſimplex linea, ſiue diameter circuli. </s>
            </p>
            <p id="N2A018" type="main">
              <s id="N2A01A">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              23.
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              </s>
            </p>
            <p id="N2A026" type="main">
              <s id="N2A028">
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              Si voluatur rectangulum parallelum orbi in quo voluitur determinari
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                <emph type="italics"/>
              po­
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              test centrum percuſſionis
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              ; </s>
              <s id="N2A039">ſit enim rectangulum AD, quod voluatur circa
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              centrum A, eo modo, quo dictum eſt ſit ducta AD, inueniatur centrum
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              I, trianguli ABD; </s>
              <s id="N2A041">itemque centrum H, trianguli ADF, per Th. 17.
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              tùm ducta IH, diuidatur bifariam in K; </s>
              <s id="N2A047">ducatur AK, tùm GK perpen­
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              dicularis in AK: dico G eſſe centrum percuſſionis, per poſ.7.& Theo­
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              rema 17. </s>
            </p>
            <p id="N2A04F" type="main">
              <s id="N2A051">
                <emph type="center"/>
                <emph type="italics"/>
              Corollarium.
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                <emph.end type="center"/>
              </s>
            </p>
            <p id="N2A05D" type="main">
              <s id="N2A05F">Colligo ex his facilè poſſe determinari centrum percuſſionis in alijs
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              figuris planis; quia diuidi poſſunt in plura triangula. </s>
            </p>
            <p id="N2A065" type="main">
              <s id="N2A067">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              24.
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              </s>
            </p>
            <p id="N2A073" type="main">
              <s id="N2A075">
                <emph type="italics"/>
              Poteſt determinari centrum percuſſionis ſolidi
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                <emph type="italics"/>
              trium facierum ABDE
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              ; </s>
              <s id="N2A084">
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              vt demonſtretur centrum percuſſionis pyramidis, & priſmatis, præmitti
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              debuit hoc ſolidum; </s>
              <s id="N2A08B">ſit enim ſolidum priori ſimile, A.M. G.C. motus
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              puncti M, eſt ad motum puncti G, vt recta BM ad rectam BG; </s>
              <s id="N2A091">igitur ſit
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              NK ad OH, vt BM ad BG; </s>
              <s id="N2A097">certè perinde ſe habet punctum M, atque
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              ſi NMK incubaret, non quidem per MG, ſed per lineam perpendicu­
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              larem ductam in BM, vt patet ex dictis: </s>
              <s id="N2A09F">idem dico de puncto G, quod
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              perinde ſe habet, atque ſi incubaret OGH; </s>
              <s id="N2A0A5">itaque inuenire oportet
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              centrum grauitatis ſolidi ACHKNOA, quod vt fiat, aſſumatur IP </s>
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