Valerio, Luca, De centro gravitatis solidorum, 1604

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                <pb xlink:href="043/01/013.jpg" pagenum="5"/>
              motiori; ſolidum circa axem in alteram partem de
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              ficiens nominetur: quo nomine ſignificari etiam
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              volumus ea ſolida, quorum quælibet ſectiones
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              baſi parallelæ quamuis baſi non ſint omnino ſimi­
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              les, tamen ijs figuris deficiunt, quæ ſunt ſimiles
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              haſi, ac totis ijs, à quibus ipſæ ablatæ intelli­
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              guntur, ita vt tota figura & ablata habeant com­
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              mune centrum in vna recta linea ad centrum ba­
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              ſis terminata, quæ & ipſa talis ſolidi axis nomi­
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              netur. </s>
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              <s>Vt in figura, ſolidi ABDC deficientis ſolido CED
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              baſis eſt circulus AB, terminus baſi oppoſitus circum­
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              ferentia circuli CMD. axis communis omnibus EF,
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              per cuius quodlibet punctum I plano baſi AB paralle­
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              lo ſecante ſolidum ABDC, & ablatum CED, & re­
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              ſiduum, eſt totius
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              ſectio circulus G
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              H, ablati vero cir­
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              culus KL, & reſi­
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              dui ſectio reliquum
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              circuli GH dem­
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              pto circulo KL.
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              quarum ſectionum
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              omnium centrum
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              commune eſt I.
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              </s>
              <s>Quod ſi ſuper duos
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              circulos GH, KL circa axem communem EI cylin­
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              dri deſcribantur, (erunt autem eiuſdem altitudinis) erit
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              reliquum cylindri GB, dempto cylindro cuius baſis
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              KL, axis EI, conſtitutum ſuper baſim G,
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              K
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              , & circa
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              axim EI, quæ ſuo loco expectatur cogitatio. </s>
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