Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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DE S*TATICÆ PRAXI.*
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ex theſi, itaque navis eſt tripla 900 ℔, hoc eſt pendet 2700 ℔, cujus ratio ad gra-
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vitatem hominis verſantis eſt octupla. </
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<
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">Atque hoc-quidem tali ſitu, ſed ſi navis
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promoveatur & </
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">ſurſum attollatur, ductarius funis eò adſcendet rectius (niſi for-
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tè alibi in navi firmetur) & </
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<
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rit rationem, & </
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">propterea ſitus æquamentum paulò majus foret quam 900 ℔.
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<
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">tympanum juſtæ quantitatis fabricari cupiet, quod nec
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mole ſua excedat, aut exilitate deficiat, rationem inibit ſitus, quo navis graviſ-
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ſima cum erit, maxima potentia opus habebit.</
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<
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<
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">hominis E potentiam, ſe tum exe-
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rere maximè cum funis ductarius G H plano aggeris P N parallelus erit, tum
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enim H G navis axi perpendicularis inſiſtit, hoc eſt, rectæ per navis gravitatis
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centrum plano P N perpendiculari. </
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ad paralleliſmum magis accedunt, tantò faciliús, & </
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ra movebuntur.</
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<
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montis clivus, currus C D 2000 ℔, E F funis eſto, G equus currui hoc ſitu
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æquivalens, tum H I, I K perpendiculares plano A B, & </
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H K; </
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">1 libri erit, ut K H ad H I, ſic pondus obliquè
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attollens cujus vicem equus explet, ad gravitatem currus, ſed K H quarta pars
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eſt H I ex theſi; </
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quarta pars currus; </
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@0 ℔ dorſum, atque hoc quidem (videlicet cum promovebitur) præter im-
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preſtionem iſtam quâ afficitur in campi planitie trahens.</
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