Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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                <pb xlink:href="018/01/188.jpg" pagenum="174"/>
              in aquâ. </s>
              <s>Hanc autem grauitatem defecti­
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              uam vocemus leuitatem, nec ab hac vocę
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              abhorreamus. </s>
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            <p type="main">
              <s>Et ſanè vſus iſte numerorum defectiuo­
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                <arrow.to.target n="note82"/>
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              rum ad leuitatem exprimendam mihi vide­
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              tur aptiſſimus, ita vt leuiſſimo negotio con­
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              ſtet, vtrùm oblata moles compoſita leuior
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              ſit, an grauior quàm aqua. </s>
              <s>Si enim datâ Ra­
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              tione molis corporum totam molem com­
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              ponentium, & datâ Ratione grauitatis ſin­
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              gulorum aut leuitatis ſpecificæ intrà aquam,
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              ducatur numerus partium in numerum, quo
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              leuitas, aut grauitas deſignatur, horum ſum­
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              ma ſi defectiua ſit, molem illam aquâ leuio­
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              rem indicabit. </s>
              <s>Quæramus ex. gr. an dolium
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              ferreis circulis firmatum, ac vino plenum,
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              ſit leuius aquâ, nec ne. </s>
              <s>Et primùm quarum
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              partium ferrum eſt 3, earum ſit lignum 400,
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              & vinum 100000. Deinde ſpecifica in aëre
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              grauitas ferri ſit 42, ligni 4. vini 5 1/4 ad a­
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              quam 5 1/3. Eſt igitur grauitas ſpecifica ferri
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              in aquâ + 36 2/3, quæ per 3 numerum partium
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              ducta dat totam ferri grauitatem + 110. Gra­
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              uitas ſpecifica ligni in aquâ, ſeu potius leui­
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              tas eſt——1 1/3, quæ per 400 numerum par­
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              tium ducta dat totam ligni leuitatem——
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              533 1/3. Demum ſpecifica leuitas vini in aquâ </s>
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        </body>
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