Archimedes
,
Natation of bodies
,
1662
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ſtanding as before, we will again
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demonſtrate, that N T is equall to
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V I; and that the Portions A V Q
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and A N Z are equall to each other.
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>Therefore, in regard, that in the
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Equall and Like Portions A V Q L
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and A N Z G, there are drawn
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A Q and A Z cutting off equall Por
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tions, they ſhall with the Diameters
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of the Portions, contain equall
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Angles. </
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>Therefore, in the Triangles
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N L S and V
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C, the Angles at
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the Points
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L
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and
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are equall; and the Right Line B S equall to
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B C; S R to C R; N X to V H; and X T to H I: And, ſince
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V Y is double to Y I, N X ſhall be greater than double of X T.
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>Let therefore, N M be double to M T. </
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>It is hence again manifeſt,
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that the Portion will not remain, but ſhall incline on the part
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towards A: But it was ſuppoſed, that the ſaid Portion did
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touch the Surface of the Liquid in one ſole Point: Therefore,
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its Baſe muſt of neceſſity ſubmerge farther into the Liquid.</
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>CONCLVSION V.</
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If the Portion have leſſer proportion in Gravity to
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the Liquid, than the Square F P to the Square
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B D, being demitted into the Liquid, and in
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clined, ſo, as that its Baſe touch not the Liquid,
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it ſhall ſtand ſo inclined, as that its Axis ſhall
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make an Angle with the Surface of the Liquid,
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leſſe than the Angle
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And its Baſe ſhall
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not in the leaſt touch the Liquids Surface.
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>Finally, let the Portion have leſſer proportion to the Liquid
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in Gravity, than the Square F P hath to the Square B D; and
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as the Portion is in Gravity to the Liquid, ſo let the
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Square made of the Line
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be to the Square B D.
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ſhall be
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leſſer than P F. Again, apply any Right Line as G I, falling
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betwixt the Sections A G Q L and A X D, and parallel to B D;
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and let it cut the Middle Conick Section in the Point H, and </
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