Galilei, Galileo, De Motu Antiquiora

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                  <s id="id.1.1.11.05.02">
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                  scendunt in aëre quam in </s>
                  <s id="id.1.1.11.05.03">Adde: supra demonstratum est, gravia quae in aqua deorsum feruntur, tanta vi descendere, quanto eorum gravitas gravitatem molis aquae eorum moli aequalis </s>
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                  <figure id="id.1.1.1.1.06.00" xlink:href="FIG1/F016.jpg" number="16"/>
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                  <s id="id.1.1.11.06.01">Si ergo fuerit corpus aliquod grave, ut, verbigratia, corpus in quo a, cuius gravitas sit 8, gravitas autem
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                  aquae b, cuius moles aequetur moli a, sit 4, tunc solidum a in aqua feretur deorsum ita celeriter et facile ut 4; si vero deinde idem corpus ferretur per medium levius quam medium b, ita ut talis medii tanta moles quanta est moles ipsius b haberet tantum 3 gravitatis, tunc a in tali medio moveretur ita celeriter et facile ut </s>
                  <s id="id.1.1.11.06.02">Patet, igitur, quod idem corpus a facilius deorsum movetur per media leviora quam per graviora: ergo necessario sequitur, quod medium eo levius existimandum sit, quo gravia in eo facilius deorsum moventur; cuius contrarium ipsi </s>
                  <s id="id.1.1.11.06.03">Cui igitur iam non apertissimum est
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                  quod, si aër adhuc levior esset, gravia deorsum facilius </s>
                  <s id="id.1.1.11.06.04">Quod si sic est, sequitur, aërem ideo levem esse, quia gravia in eo facile deorsum </s>
                  <s id="id.1.1.11.06.05">Opposito autem modo de levibus ratiocinantes, colligemus, medium illud grave existimandum esse, per quod levia facilius sursum feruntur; illud vero leve, per quod levia difficile </s>
                  <s id="id.1.1.11.06.06">Ergo, tum quia in aëre levia difficilius sursum moventur, tum quia in eodem gravia facilius deorsum moventur, sequitur aërem </s>
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