Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

Table of figures

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              quæ à centro ad periferiam tendit, vt illa, quæ ex brachio, &
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              funda conſtituitur in rotatione; tanto velocius mouetur.
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              <s id="N14832">Cumque ex maiori velocitate iſtius motus, maior impetus
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              producatur; hinc fit, vt quod funda iacitur, tanquam per
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              velociorem iaculationem, maiorem impetum à funditore
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              recipiat, quàm ſi manu mittatur, longiuſque valde proinde
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              feratur. </s>
              <s id="N1483D">Iactus enim qui manu fit, inquit Ariſtoteles, breuis
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              eſt reſpectu ſcilicet eius, qui funda efficitur. </s>
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              <s id="N14844">Ad primam igitur rationem dubitandi reſponderi poteſt,
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              maiorem, aut minorem comprehenſionem proiecti, parum
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              aut nihil conferre ad vlteriorem eius emiſsionem, ſed po­
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              tius modum comprehendendi diuerſum proportionatum,
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              in quantum ſcilicet ipſa comprehenſio ad commoditatem
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              pertinet iaculandi quaſi artificiosè. </s>
              <s id="N14851">Vt ſi quis teſtam, vel
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              complanatum lapillum eminus proijcere velit, inter pol­
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              licem, & indicem ſupra medium digitum collocat, vt ip­
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              ſo indice incuſſo impetu in latus poſterius, ille per aera, ean­
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              dem poſitionem ſeruando, feratur, qua cum facilius præeun­
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              te acie aerem ſcindat, vlterius quoque pergere valeat. </s>
              <s id="N1485E">Alio­
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              quin ad abſolutam proiecti emiſsionem, ſatis illud com­
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              prehenditur funda,
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              nihil minor comprehenſio ob­
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              ſtat, quominus funditor longius iaciat, cum hoc ſibi vendi­
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              cet aliunde. </s>
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            <p id="N1486D" type="main">
              <s id="N1486F">Ad ſecundam reſpondetur, grauitatem inſtrumenti nul­
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              lam, vt plurimum augere difficultatem in latione, aut
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              proiectione ponderis dummodo proportionem quandam
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              habeat cum potentia motrice, vt patere poteſt inductio­
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              ne, tam in vectibus plurimis, ac rotis curruum, quàm in
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              in machinis bellicis, aut venatorijs, quibus miſsilia iaciuntur.
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              <s id="N1487D">Quare cum grauitas fundæ, vel nullius momenti in ſe ſit,
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              vel ad ſummum ſit grauitas inſtrumenti, nullam pariter ſu­
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              pra pondus proiecti augere poteſt difficultatem, ad quam
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              ſuperandam maior conatus potentiæ requiratur, minuſque
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              propterea funda, quàm ſola manu, proiectum mittatur. </s>
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            <p id="N14888" type="main">
              <s id="N1488A">Vna tamen adhuc ſupereſt difficultas, quæ non mediocris
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              eſt momenti; nimirum quo pacto motus circularis, quo </s>
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