Ceva, Giovanni, Geometria motus, 1692

Table of figures

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              <s id="s.000840">Funiculi AB, GH trahantur à ponderibus quibuſcunque
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              C, I in C, et I. </s>
              <s id="s.000841">Dico ſi exempta ſint pondera, fore, vt ſpatia
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              quæ acceleratis motibus exiguntur ab extremitatibus ſo­
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              lutis C, I ſint in ratione compoſita ex duplicata IH ad BC,
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              craſſitudinis ad craſſitudinem funiculorum AB, GH; dein­
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              de ex funiculi longitudine HG ad longitudinem AB, pon­
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              deriſque I ad pondus C. </s>
              <s id="s.000842">Intelligatur funiculus, ſeu chor­
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              da, æque craſſa, ac ſimiliter cedens, quàm GH (id quod
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              ſemper intelligimus quoties funiculi, interſe comparantur)
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              ſed æquè longa, ac AB, ſitque illi pondus F adiectum, ad
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              quod C eandem habeat rationem, ac craſſities AB ad craſ­
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              ſitiem DE, conſtat elongationem EF æqualem fieri ipſi
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              CB, & cum primæ velocitates, ſeu amplitudines æquè al­
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              tarum geneſum ſimilium, ſimpliciumque motuum ſint
                <expan abbr="etiã">etiam</expan>
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              æquales, ſpatia decurſuum acceleratis motibus exacta
                <expan abbr="erũt">erunt</expan>
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              prorſus æqualia; ſunt verò funiculi DE, GH eiuſdem craſ­
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              ſitiei, eiſque ſunt ſuſpenſa duo'pondera inæqualia F, I; ergo
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              decurſuum ſpatia ab extremitatibus ſolutis exacta
                <expan abbr="nectẽ-tur">necten­
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                tur</expan>
              ex ratione duplicata elongationum FE, ſeu CB ad IH,
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              ex ratione, quam habent longitudines funiculorum HG ad
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              DE, ſeu AB, & ex ea ponderum I ad F; verùm pondera I
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              ad F nectuntur ex rationibus ponderum I ad C et C ad F,
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              quæ poſtrema eſt ratio craſſitiei funiculi AB ad craſſitiem
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              funiculi DE, ſeu GH; ergo vt propoſuimus ſpatia accele­
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              ratis motibus exacta, nectentur ex rationibus
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              CB ad HI; craſſitudinum funiculorum AB, GH;
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              I ad C, & longitudinum HG ad AB. </s>
              <s id="s.000843">Quod &c. </s>
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              PROP. XXXXVI. THEOR. XXXIX.
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              <s id="s.000845">TEmpora geneſum ſimplicium, dum chordis ſuſpen­
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              duntur quæcunque grauia, nectuntur, ex ratione
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              elongationum funiculorum, & ex contrariè ſumptis ratio
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              nibus, craſſitudinum, longitudinumque funiculorum, nec </s>
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