Stevin, Simon
,
Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis
,
1605
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1 L*IBER* S*TATICÆ*
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xml:space
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bile, &</
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">Si linearum alteralatus columnæ non ſecet, eò uſque continuandum eſſe
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latus donec ſecetur, ut in proximè antecedentium figurarum noviſſimâ vi-
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dere eſt.</
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">mobile, ex
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quo dependentia pondera, unum rectè, alterum obliquè
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demittens in dato ſitu columnam conſervant: </
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<
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">erit quem-
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admodum linea rectè demittens ad lineam obliquè de-
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mitten tem: </
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<
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">ita pondus rectum ad pondus obliquum.</
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</
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<
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">AB eſto columna, cujus axis ſit CD, in eoq́ue E punctum fir-
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mum, F mobile, cui G pondus rectè demittens appenſum columnam in da-
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to ſitu ſervat: </
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<
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">indidem quoque dependĕs pondus H obliquè demittens (coër-
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cito velamoto G) in ſitu ſuo eandem ſervat: </
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<
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tus illius in I, obliquè autem demittens in K.</
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mittens, ad FK obliquè demittentem: </
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pondus H demittens obliquè.</
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">P*RAEPARATIO*. </
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">Punctum L ſignator, ut EL æquetur EF, hinc pun-
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cto L accommodetur pondus M rectè attollens, columnamq́ue in ſitu ſer-
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vans, cujus recta attollens L N: </
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<
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mnamq́ue in ſitu ſervans, cujus linea obliquè attollens LP parallela ſit ad F K.</
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ad O per 20 propoſitionem, atqui po-
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tentia G in columnam æquatur poten-
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tiæ M, & </
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13 propoſitionĕ, & </
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atque F K æqualis eſt LP. </
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modum igitur IF rectè demittens ad
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F K obliquè demittentem : </
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G rectè demittens, ad H demittens
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obliquè. </
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<
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xml:space
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">eadem demonſtratio erit alio-
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rum omnium, ut videre eſt in ſubje-
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ctis exemplis.</
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