Valerio, Luca
,
De centro gravitatis solidorvm libri tres
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trum grauitatis. </
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PROPOSITIO XXX.
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>Omnis prædictæ figuræ centrum grauitatis
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eſt propinquius baſi, quàm cuiuſlibet figuræ ex
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cylindris, vel cylindri portionibus, vel parallelo
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grammis æqualium altitudinum ipſi circumſcri
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ptæ. </
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<
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>Sit prædicta figura ABC, cuius axis vel diameter BD,
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& data intelligatur figura ex quotcumque cylindris, vel cy
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lindri portionibus, vel parallelogrammis æqualium altitu
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dinum figuræ ABC circumſcripta, cuius ſit centrum gra
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uitatis E, nempe in axe vel
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diametro BD. </
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<
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trum grauitatis figuræ ABC
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propinquius eſſe puncto D,
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quàm punctum E. </
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fieri poteſt, centrum grauita
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tis figuræ ABC, quod ſit
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F, non cadat infra punctum
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E, ſed vel ſupra, vel con
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gruat puncto E: figuræ ita
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que ABC circumſcribatur
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figura quædam ex cylindris,
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vel cylindri portionibus, vel
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parallelogrammis <17>qualium
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altitudinum, cuius centrum
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grauitatis, quod ſit G, ſit propinquius D puncto, quàm
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punctum E, ac propterea propinquius, quàm punctum F,
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centrum grauitatis figuræ primo circumſcriptæ. </
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<
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multiplicatis cylindris, vel cylindri portionibus, vel paral-</
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