Jordanus de Nemore, [Liber de ratione ponderis], 1565
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                Verbi gratia. </s>
                <s id="id.2.24.01.03">Sit responsa a, b,
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                c, perpendiculum b, u, e, cen­
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                trum d, et sit a, pondus ma­
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                ius, quám c, ducantur ergo lineae d,
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                a, d, e, et pertranseat d, a, a, 3,. do­
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                nec sit d, a, 3, ad d, a, tamquam a pon
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                dus ad c, sitque , 3, ponderet ut c.
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                <s id="id.2.24.01.04">Quia igitur tria pondera a, c, 3, sic
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                dependent in a, b, c, atque reuo­
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                lutio eorum circa centrum d, quare
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                essent in lineis d, a, 3, et d, c, sed po­
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                sitis ita ipsis tantum uellet 3, dista­
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                re a directo d, quantum , et c, distabit
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                quoque et a, proportionaliter a dire
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                cto eiusdem non ergo ad directum
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                quum poterit pertingere.
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                <s id="id.2.25.00.01">Quaestio uigesimaquarta.
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                <s id="id.2.25.01.01">Quum sit igitur distantia cen­
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                tri a medio. Responsae ad longi
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                tudinem ipsius data ponderaque
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                appensa ad pondus regulae da
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                ta erit perpendiculi declina­
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                tio data.
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                <s id="id.2.25.02.01">Sit regula, quae directum determi
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                nat h, d, l, 3, et c. ut prius, decli­
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                netque regula ex parte a, donec
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                linea h, d, l, 3, secet in l, quasi ergo
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                centrum exanimis esset in l, sicut si­
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                ta est. Responsa</s>
                <s id="id.2.25.02.02">quum ergo sine pon
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                dera data, et regula , erunt sectio
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                nes. Responsae quae sunt a, l, l, c, datae
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                quasi longitudo utriusque ad b, d, da
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                ta erit</s>
                <s id="id.2.25.02.03"> similiter et l, b, quia etiam
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                angulus l, d, b, datus erit , et est ut
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                angulus c, u, h, et ipsa est declina­
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                tio perpendiculi a directo data.</s>
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