Valerio, Luca, De centro gravitatis solidorum, 1604

Table of figures

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              feras, reliquæ BF, FD æquales erunt; tota igitur FH to­
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              ti FK æqualis eſt: in triangulo autem AHK recta AF
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              ſecat LM, HK parallelas in eaſdem rationes; erit igitur
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              LG æqualis ipſi GM; cum igitur æqualium triangulo­
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              rum ABC, ADE centra grauitatis ſint L, M; erit com
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              poſiti ex vtroque centrum grauitatis G. </s>
              <s>Idem oſtendere­
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              mus, quod proponitur, & ſi baſes prædictorum triangulo­
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              rum ſint continuæ. </s>
              <s>Manifeſtum eſt igitur propoſitum. </s>
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              PROPOSITIO XXIII.
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              <s>Si duæ parabolæ in eodem plano circa æqua­
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              les diamet ros in directum inter ſe conſtitutas, ita
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              vt vertices ſint extrema ex diametris compoſitæ,
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              communem habuerint aliquam ordinatim ad dia
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              metrum applicatarum, & vertices cum puncto con
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              uenientiæ iungantur rectis lineis: centrum gra­
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              uitatis v triuſque portionis ijs rectis lineis ab ſciſ
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              ſæ, rectam lineam, quæ terminum communem
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              diamctrorum, & concurſum parabolarum iungit
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              bifariam diuidit. </s>
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              <s>Circa æquales
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              diametros AD,
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              DC indirectum
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              inter ſe conſtitutas,
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              verticibus A, C,
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              duæ parabolæ in
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              eodem plano
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                munem</expan>
              habeant ali­
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              quam BD ordi­
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                <figure id="id.043.01.224.1.jpg" xlink:href="043/01/224/1.jpg" number="165"/>
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