Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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A*DDITAMENTI* S*TATICÆ PARS PRIMA*
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C E, tumq́ue C E ab alteris dua-
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bus EF, E G, ut univerſim totum
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pondus A B è tribus lineis C D,
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E F, E G dependeat, etiam tum
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ſciri poterit quantum quæq́ue
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ferat namq́ue per 5 conſ. </
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detur quid ad C D & </
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neat: </
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<
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">deinde per 7 cõſectarium ſin-
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gulis EF, EG ratam partem pon-
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deris quod ad C E pertinet di-
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ſtribues.</
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<
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">Præterea etiam C D in duo alia
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retinacula D H, D I diviſa, quid
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illorum cujuſque propriumſit, eo-
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dem quoque modo concludes. </
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<
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">quare quantum ponderis ſingulis lineis E F,
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E G, DH, DI cedat ſiverectæ iſtæ in eodem ſint plano, ſeu in diverſis, co-
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gnoſcere licebit.</
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<
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">Notato autem lineas C E G, C E F ac cæteras ſimiles non porrigi in di-
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rectum, ſed ab ipſis ad E angulum neceſſariò comprehendi, cum E F ex
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hypotheſi alicujus efficientiæ ſit, unde angulus exiſtit ad E, eadem mode
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quoque recta E G aget in rectam C E F.</
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<
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">Præterea ſi ab F alia duo retinacula adjungantur F K, F L, etiam hic quan-
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@m ponderis ad utramlibet ipſarum pertingat invenire in promptu eſt. </
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