Jordanus de Nemore, [Liber de ratione ponderis], 1565
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                ex parte c, pondus b, datum, sitque b, e,
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                aequalis b, c, et in medio a ,e, notetur
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                z, á quo dependeat pondus h, aequa­
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                le a, e, et in eo etiam situ aeque pon­
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                derabit. </s>
                <s id="id.2.12.02.02">Quia ergo in hoc situ aeque
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                ponderant h, et d, eritque proportio d,
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                ad h, ea z, b. </s>
                <s id="id.2.12.02.03">ad b, c, et permutatim
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                quae proportio d, ad z, b, ea est a, e,
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                hoc est h, ad b, c, et coniunctim quae
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                proportio d, et dupli z, b, hoc est a, c,
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                ad z, b, ea est a, e, et dupli b, c, hoc est
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                e, c, ad b, c. </s>
                <s id="id.2.12.02.04">Si ergo tota a, b, c, ducatur
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                in suum dimidium, et perductum diui
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                datur per d, et a, c, quod totum est da
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                tum, exibit b, c,. datum.
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                <s id="id.2.13.00.01">Quaestio duodecima.
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                <s id="id.2.13.01.01">Quod si portiones datae fue­
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                rint, et pondus datum erit.
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                <s id="id.2.13.02.01">Cum enim ut praemissum est d,
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                pondus cum tota a, c, sit ad eius
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                dimidium, sicut tota a, c, ad b,
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                c. cum sint a, b, et b, c, datae, si ducatur
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                a, c, in suum dimidium, ut prius, et pro
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                ductum diuidatur per b, c, exibit pon
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                dus d, et tota a, c, detracta ergo a, c,
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                relinquitur pondus d, datum.
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                <s id="id.2.14.00.01">Quaestio tertiadecima.
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                <s id="id.2.14.01.01">Si uero pondus datum fue­
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                rit, et pars cui appenditur da­
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                ta, totum quoque datum erit.
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                <s id="id.2.14.02.01">Verbi gratia d, pondus datum
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                sit, et b, c, portio data. </s>
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                <s id="id.2.14.03.01">Quia
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                igitur d, ad h, siue ad e, a, sicut
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                z, b, ad b, e, erit, quód ex ductu d, in c,</s>
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Impressum