Galilei, Galileo, Les méchaniques, 1634

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III. SVPPOSITION.
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<s id="s.000110">Le centre de la peſanteur de deux
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corps également peſans eſt au milieu
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de la ligne droite qui conioint les cen­
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tres de peſanteur deſdits corps; c'eſt à
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dire que deux corps également peſans,
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& également éloignez de l'appuy de la
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balance ont le point de leur équilibre
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au milieu de la commune conjonction
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de leurs éloignemens égaux: par exem­
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ple, la diſtance CA, eſtant égale à la
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diſtance CB, & les deux poids égaux
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G & H, eſtant ſuſpendus aux points A
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& B, il n'y a nulle raiſon pour laquelle
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ils doiuent pluſtoſt s'incliner d'vn coſté
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que de l'autre. </s>
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<s id="s.000111">Mais il faut remarquer que la diſtan­
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ce des poids, ou des corps peſans d'auec
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l'appuy
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ſe doit
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meſurer
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par les li­
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gnes
<expan abbr="perpẽdiculaires">perpendiculaires</expan>
, qui tombent des
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points de la
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, ou des centres de
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la peſanteur de chaque corps iuſques
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au centre de la terre. </s>
<s id="s.000112">De là vient que </s>
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