Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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*DE* S*TATICÆ PRINCIPITS.*
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DEINCEPS SVCCEDVNT.</
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trum.</
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trum occurrens baſi B C D in F, ſit A F.</
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tuor pyramidibus ſimilibus & </
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E, ipſa A F erit ejus gravitatis diameter; </
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">eadem ratio erit rectæ
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C E; </
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demonſtratio erit in reliquis corporibus cum auctis & </
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nutis tum etiam abſolutè ordinatis quæ centrum ſoliditatis
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habebunt, nam ipſa ex diametris vel per angulum ſolidum, vel
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per hedrarũ centra eductis ſuſpenſa, ratio ſitus componentum
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pyramidum (quarum quidem vertices eodem coëunt, & </
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ſolidi ipſius ſint hedræ) ad latera omnia par erit, quamobrem
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ex communi notitia, & </
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æquilibria dependebunt; </
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figuræ iſtiuſmodi diametrorum interſectio, ceutrum quoque gravitatis erit.</
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biſectricem interſecent in punctis K, L, & </
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ad ipſam D E; </
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reliquæ he@ræ parallelogrammæ biſecentur plano R S baſi A D C parallelo,
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à quò C B bifariam dividatur in puncto S.</
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dras biſecante, tribuit priſma H N F M P G I in duo priſmata æqualia & </
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lia; </
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