DelMonte, Guidubaldo, Le mechaniche
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            <p id="id.2.1.1006.0.0" type="head">
              <s id="id.2.1.1006.1.0">PROPOSITIONE XX. </s>
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            <p id="id.2.1.1007.0.0" type="main">
              <s id="id.2.1.1007.1.0">Se à ciaſcuna delle girelle dell'vna & l'altra delle due taglie, l'v­
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              na delle quali ſia ſoſtenuta di ſopra dalla poſſanza, & di ſotto
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              ſia poſta, & legata al peſo, ſarà inuolta d'intorno la corda;
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              con l'vno de' ſuoi capi legato in qualche loco, & l'altro attac­
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              cato alla taglia di ſotto; il peſo ſarà vna volta & meza tanto
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              quanto la poſſanza. </s>
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            <p id="id.2.1.1008.0.0" type="main">
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              Sia ABC la girella della taglia di ſopra, & DEF
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              quella della taglia di ſotto legata al peſo G; &
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              ſia la corda HABCDEFK inuolta d'intorno
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              alle, girelle laqual corda ſia legata in K, & in H
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              alla taglia di ſotto; & ſia in L la poſſanza che
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              ſoſtiene il peſo G. </s>
              <s id="id.2.1.1008.2.0">Dico, che il peſo è vna volta
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              & meza tanto quanto la poſſanza. </s>
              <s id="id.2.1.1008.3.0">Hor percio­
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              che l'vna, & l'altra corda CD AH ſoſtiene la
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              terza parte del peſo G; ſarà ogn'vna delle poſ­
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              ſanze poſte in DH vn terzo del peſo G; alle
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              quali tutte preſe inſieme è eguale la poſſanza di
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                <arrow.to.target n="note257"/>
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              L: peroche la detta poſſanza di L è due volte
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              tanto quanto è la poſſanza di D, & di quella
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              che ſta in H. </s>
              <s id="id.2.1.1008.4.0">Per laqual coſa la poſſanza di L
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              viene ad eſſere ſotto ſeſquialtera del peſo G.
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              </s>
              <s id="id.2.1.1008.5.0">Adunque il peſo G verſo la poſſanza di L è co­
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              me tre à due. </s>
              <s id="id.2.1.1008.6.0">cioè vna volta & meza. </s>
              <s id="id.2.1.1008.7.0">che biſo­
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              gnaua moſtrare.
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            <p id="id.2.1.1009.0.0" type="margin">
              <s id="id.2.1.1009.1.0">
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              Per il corollario della
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              5.
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              di queſto.
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              </s>
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            <p id="id.2.1.1010.0.0" type="margin">
              <s id="id.2.1.1010.1.0">
                <margin.target id="note257"/>
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              Per la
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              15.
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              di questo.
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              </s>
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            <p id="id.2.1.1012.0.0" type="main">
              <s id="id.2.1.1012.1.0">“Per laqual coſa la poſſanza di L è ſotto ſeſquialtera del peſo G. </s>
              <s id="id.2.1.1012.2.0">Hò detto, che il
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              ſopraparticolare è il ſecondo genere de'moltiplici, la prima ſpetie del quale è
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              tre à due, che è ſeſquialtera, cioè vna volta & meza. </s>
              <s id="id.2.1.1012.3.0">Hor chi fà comparatione
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              al contrario di due à tre naſce la ſotto ſeſquialtera, hauendo forza quella voce
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              ſotto di paragonare la minore quantita con la maggiore. </s>
              <s id="id.2.1.1012.4.0">La poſſanza dunque di
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              L ſarà in proportione co'l peſo G come dueà tre, & in queſta guiſa deueſi in­
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              tendere ſempre tale vocabolo. </s>
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