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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<
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D E inſidenti æquepondium per 13 propoſ.
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vitatis centrum per 21 propoſ. </
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inventum ſit H, unde H I parallela agatur
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contra G E, ejus in fundo D E terminus I
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optatũ erit preſſus gravitatis centrum; </
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demonſtratio antecedentium 18 & </
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poſſit, quia tamen Statica factio expeditior certiorq́ue ſit, & </
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ſertim inordinatis propius verum collimet, eam hic exponere ſtatui.</
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hoc eſt per 1 defin. </
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mitur. </
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cubici pro quæſita magnitudine corporis A.</
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ipſaq́ue per 2 poſtul. </
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tatis ſuæ ad 65 ℔ eadem erit, quæ magnitudinis ad pedem cubi-
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cum; </
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dine æquatur 1 {1/3} pedis. </
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magnitudine; </
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vitatis rationibus inter ſe, cum pondere alterius, reliqui
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quoque pondus invenire.</
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materiæ autem gravitas ut 1 ad 2, atque A B librarum 6.</
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