DelMonte, Guidubaldo
,
Mechanicorvm Liber
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donec libra EF in AB redeat. </
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">quod demonſtrare oportebat. </
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4
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Primi.
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Ex
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28
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Tertii.
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29
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Primi.
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<
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">Huius autem effectus ratio ab Ariſtotele poſita, hic manifeſta in
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tueri poteſt. </
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<
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">ſit enim punctum N vbi CS EF ſe inuicem ſecant. </
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& quoniam HE eſt ipſi HF æqualis; erit NE maior NF. </
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nea ergo CS, quam perpendiculum vocat, libram EF in partes di
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uidet inæquales. </
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<
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">cùm itaq; pars libræ NE ſit maior NF; atq; id,
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quod plus eſt, neceſſe eſt, deorſum ferri: libra ergo EF ex parte E
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deorſum mouebitur, donec in AB redeat. </
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Ariſtotelis ratio.
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<
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">Ex iis præterea, quæ ha
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ctenus dicta ſunt inferre li
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cet, libram EF velocius ab
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eo ſitu in AB moueri; vndè
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linea EF in directum pro
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tracta in centrum mundi
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perueniat. </
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<
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">vt ſit EFS recta
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linea. </
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">& quoniam CD
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CH, ſunt inter ſe ſe æqua
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les. </
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<
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">ſi igitur centro C, ſpa
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tioq; CD, circulus deſcri
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batur DHM; erunt pun
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cta DH in circuli circum
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ferentia. </
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<
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">Quoniam au
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tem CH ipſi EF eſt per
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pendicularis; continget li
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nea EHS circulum DHM
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in puncto H. </
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<
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">pondus igi
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tur in H (ſicuti ſupra de
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monſtrauimus) grauius
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erit, quàm in alio ſitu circuli DHM. </
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<
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">ergo magnitudo ex EF
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ponderibus, & libra EF compoſita, cuius centrum grauitatis eſt
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in H, in hoc ſitu magis grauitabit, quàm in quocunq; alio ſitu </
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