Valerio, Luca, De centro gravitatis solidorum, 1604

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                <pb xlink:href="043/01/166.jpg" pagenum="79"/>
              cumque multiplicatione; ſint duæ partes æquales proximæ
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              baſi DF, FQ: & per puncta FQ duo plana baſium pla­
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              no parallela tres prædictas figuras ſolidas ſecare intelli­
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              gantur: ſecabunt autem & tres figuras per axim, eruntque
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              ſectiones rectæ lineæ ad diametrum figurarum ordinatim
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              applicatæ propter
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              plana ſecantia pa
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              rallela: trium au­
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              tem ſolidorum ſe
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              ctiones & baſes
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              omnes circuli, ter
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              ni in ſingulis pla­
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              nis: ac primi qui­
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              dem ordinis ſint
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              ij, quorum diame­
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              tri ſunt baſes
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                <expan abbr="figurarũ">figurarum</expan>
              per axim,
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              trianguli ſcilicet,
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              parabolæ, & hy­
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              perboles, quæ præ
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              dictas figuras ſoli
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              das deſcribunt, re
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              ctæ lineæ AC,
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              MN, KL. </s>
              <s>Se­
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              cundi verò reten­
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              to eodem ordine
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                <expan abbr="figurarũ">figurarum</expan>
              tres
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                βε, γδ. </foreign>
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              <s>Tertij
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              denique ordinis
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              SZ, TY, VX.
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                <figure id="id.043.01.166.1.jpg" xlink:href="043/01/166/1.jpg" number="126"/>
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              Quoniam igitur eſt vt EB, ad BD, ità quadratum MD,
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              ad quadratum DK, ideſt conus MBN, ſi deſcribatur eo­
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              dem vertice B, ad conum KBL. </s>
              <s>Et vt IB, ad BE, ità eſt
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              conoides MBN, ad conum MBN, in proportione ſcili-</s>
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