Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

Table of figures

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              Quod vt præ ocu­
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              lis habeatur eſto
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              lignum AB, pon­
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              dus C appenſum
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              in D proximius
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              ipſi A; baiulorum
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              verò alter hume­
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              rum, vel manum
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              ſupponat in A; al­
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              ter in B. </s>
              <s id="N1702E">Dicimus ergo cum Ariſtotele, lignum ipſum AB,
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              vectem conſtitui ſuffultum in D, tanquam fulcimento in­
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              uerſo ad deprimendum humerum aſportantis in A, per mo­
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              tum aſportantis in B, qui baiulando, ſemper eleuare cona­
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              tur extremitatem ſibi incumbentem in B. </s>
              <s id="N17039">Quandoquidem
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              punctum D, quod conſtituitur centrum in motione ipſius
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              vectis, ita à pendente pondere præmitur, & figitur, ac ſi im­
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              mobile omnino eſſet ad fulciendum ipſum vectem. </s>
              <s id="N17042">Quod
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              euidentius fiet ſi eundem vectem inuerſo modo conſidere­
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              mus, in ſequenti fi­
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              gura; Nimirum vt
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              ſi vectis A B ſu­
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              ſpendatur in C ex
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              puncto intermedio
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              vbi D, ad eleuan­
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              dum onus impo­
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              ſitum in extremo A
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              per depreſsionem alterius extremi B. </s>
              <s id="N1705F">His namque po­
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              ſitis ad primam figuram redeuntes facilè intelligitur cur
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              baiulus geſtans in A magis grauetur à pondere C,
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              quàm geſtans in B. </s>
              <s id="N17068">Quanto enim longior eſt pars vectis
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              DB, ipſa DA, eo facilius geſtans in B eleuat, vel ſuſti­
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              net ipſum extremum B reſpectu ſuſtinentis in A tanquam
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              in loco centro vectis propinquiori quàm ſit ipſum B. </s>
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              <s id="N17073">Quod autem cum Ariſtotele explicuimus per rationem
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              vnius vectis, Piccolomineus explicat per rationem duplicis </s>
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