Benedetti, Giovanni Battista de
,
Io. Baptistae Benedicti ... Diversarvm specvlationvm mathematicarum, et physicarum liber : quarum seriem sequens pagina indicabit ; [annotated and critiqued by Guidobaldo Del Monte]
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DE MECHAN.
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">VEra ratio, cur homo dum ſedet ( non tamen Turcarum more ) ſi velit
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ſeſe in pedes erigere, calcaneos retrahit, vt efficiat angulum acutum, cum
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moribus</
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coxis à parte inferiori, & ventrem inclinat, ad conſtituendum etiam angu
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lum acutum in ſuperiori parte, ea eſt; </
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<
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xml:space
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">vt totius corporis pondus, ex ęquo, ideſt ab
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oppoſitis partibus circundet lineam rectam, quæ tranſit per locum, in quo conquie
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ſcunt pedes verſus mundi centrum. </
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<
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xml:space
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">ideſt, ut edatur ęquilibrium ponderis ipſius cor-
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poris circum lineam illam, quę ſub pedibus inſeruit pro ſparto. </
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deinde dictos duos angulos circa dictam
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, abſque vlla difficultate erigitur cor-
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pus, & abſque periculo in alterutram partem cadendi.</
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should be XXIIII
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<
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">VEra ratio, quare, quę reperiuntur in vorticibus aquarum, ſemper verſus
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medium ipſarum vertiginum vniuntur, inde promanat, quod media
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vertiginum ſemper depreſſiora ſunt. </
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<
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xml:space
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">vnde quòd dicta corpora ad medium acce-
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dant, nihil aliud eſt, quàm ipſa corpora ſuo pondere grauitateq́ue deſcendere, figu
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ra enim vorticibus eſt quaſi conica, & concaua cum angulo deorſum, & gyro baſis
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ſurſum. </
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à
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quo aliarum omnium quæſtionum, quas ego omiſi rationes ſunt benè propoſitæ.</
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