Valerio, Luca, De centro gravitatis solidorum, 1604

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              runtur, veluti BF, & GDH, quorum axis communis eſt
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              D
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              K
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              , baſes autem circuli, vel ellypſes EF, GH, qua­
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              rum commune centrum K: ſupremus autem, qui ad A,
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              ad nullum refertur. </s>
              <s>Quoniam igitur ex conſtructione,
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              cylindrus, vel cylindri portio BF, eſt minor magnitudi­
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              ne propoſita; exceſsus autem omnes, quibus cylindri, ex
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              quibus conſtat figura circumſcripta, excedunt eos, ex qui­
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              bus conſtat figura inſcripta, pro vt bini inter ſe referun­
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              tur, vna cum ſupremo, qui ad nullum refertur, ſunt æqua­
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              les cylindro, vel cylindri portioni BF, figura circum­
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              ſcripta ſolido ABC, excedet inſcriptam minori exceſ­
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              ſu magnitudine propoſita. </s>
              <s>Fieri igitur poteſt quod pro­
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              ponebamus. </s>
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            <p type="head">
              <s>
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              PROPOSITIO XII.
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              <s>Dato parallelepipedo erecto circa datam re­
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              ctam lineam tamquam axim, erectum parallele­
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              pipedum æquale conſtituere. </s>
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              <s>Sit datum parallelepipedum AB, erectum, cuius ba­
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              ſis AC, altitudo autem latus BC: & data recta linea
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              finita ED. </s>
              <s>Oportet circa rectam ED, tamquam axim
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              parallelepipedo AB, æquale parallelepipedum erectum
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              conſtituere. </s>
              <s>Per punctum igitur E, extendatur pla­
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              num erectum ad lineam ED, & vt eſt DE, ad BC, ita
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              fiat baſis AC, ad quadratum F: & ad punctum E, in
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              plano erecto ad lineam ED, quartæ parti quadrati F,
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              æquale GE, quadratum deſcribatur, & compleatur
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              quadratum GH, quadruplum quadrati EG, ſeu qua­
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              drato F, æquale: & ex puncto K, erecta KL, ipſi EF,
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              æquali, & ad ſubiectum planum perpendiculari ſuper ba­
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              ſim GH, conſtituatur parallelepipedum GK. </s>
              <s>Dico </s>
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