Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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4 L*IBER* S*TATICÆ*
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tra A B interſecet A D in I, & </
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pedum cubicorum. </
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</
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<
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">tumq́ue invenito duos numeros in ratione A F 3 ad A E 4 quorum planus ſit
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dictus octonarius; </
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quantitatem A G: </
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xml:space
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A B H I cui per 1, propoſ. </
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<
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">Tribus deinceps continuis propoſitionibus, ex ſententia Breviarii, agendum nobis de
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centris gravitatis preſſuum in fundis collectorum Vbi jure funda borizonti parallela
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primum ſibi locum depoſcerent, ſed quia ipſorum gravitatis centra (quæ ex ſecundi li-
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bri doctrina pateſcunt) à centris preſſuum diverſa non ſint, brevitatis ſtudio novum
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nullum de iis theorema inſtituimus. </
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mum ejus latus, in ſumma aquæ ſuperficie conſiſtens, & </
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imum ſibi oppoſitum biſecet, hæc à preſſus gravitatis cen-
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tro ita tribuitur ut pars ſumma reliquæ ſit dupla.</
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gramma ad horizontem annuens, cujus ſuperũ
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latus A C ſit in aquæ ſuperficie ſumma, tumq́;
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</
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tur in F & </
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diviſa ut ſegmentum F H reliqui H G ſit du-
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plum.</
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citur gravitatis eſſe centrum demonſtrator.</
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gulum C D I æquicrurum; </
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ma A C I D E
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ſit dimidia columna, cujus baſis A C D E, alti-
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tudo perpendicularis ab A uſque ad planum per
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E D horizonti parallelum.</
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ſimile priori A C I D E, planumque K L M N
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plano A C E, & </
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cularis lateri D I homologa ſunto, itemq́ue Q R
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ipſi F G: </
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gravitatis centrum T, unde V X horizonti perpendieularis ſit.</
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K L M N, tanto afficit aqua A B fundum A C D E; </
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tis centra in fundis K L M N, A C D E ſimili erunt ſitu. </
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