Ghetaldi, Marino, Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis

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            <s xml:id="echoid-s1250" xml:space="preserve">
              <pb o="60" file="0072" n="72" rhead="PROMOTVS"/>
            ratti, quidue pauciorum, hoc eſt penes quid attendatur di-
              <lb/>
            uerſa auri qualitas. </s>
            <s xml:id="echoid-s1251" xml:space="preserve">Deinde quomodo aurum alligent Auri-
              <lb/>
            fices, vel alij ad quos alligandi officium ſpectat. </s>
            <s xml:id="echoid-s1252" xml:space="preserve">His enim
              <lb/>
            cognitis, non erit difficile, id quod proponitur, certa aliqua
              <lb/>
            ratione, aſſequi.</s>
            <s xml:id="echoid-s1253" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s1254" xml:space="preserve">Aurum igitur 24. </s>
            <s xml:id="echoid-s1255" xml:space="preserve">partium appellacur aurum purum, pauciorum
              <lb/>
            vero àicitur non purum, ſed aliquo alio metallo, vel pluribus affe-
              <lb/>
            ctum. </s>
            <s xml:id="echoid-s1256" xml:space="preserve">& </s>
            <s xml:id="echoid-s1257" xml:space="preserve">quia hæc affectio multiplex eſt, ideo etiam auri qualitas,
              <lb/>
            quæ ex varia mixtione naſcitur, varia ſit est neceſſe: </s>
            <s xml:id="echoid-s1258" xml:space="preserve">quamuis vna
              <lb/>
            tantumſit qualitas auri puri. </s>
            <s xml:id="echoid-s1259" xml:space="preserve">Qualitas enim auri in quouis cor-
              <lb/>
            pore propoſito, exprimitur partibus auripuri, quæ ſunt in ipſo corpo-
              <lb/>
            re, non in magnitudine, ſed in grauitate ſumptis, qualibus totum cor-
              <lb/>
            pus constat 24: </s>
            <s xml:id="echoid-s1260" xml:space="preserve">vel quod idem est, auri qualitas exprimitur in ra-
              <lb/>
            tione quam habent illæ partes in grauitate ad totum corpus: </s>
            <s xml:id="echoid-s1261" xml:space="preserve">quod
              <lb/>
            exemplo clarius explicabitur in bunc modum.</s>
            <s xml:id="echoid-s1262" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s1263" xml:space="preserve">Sit aliquod corpus aureum, exempli gratia 24. </s>
            <s xml:id="echoid-s1264" xml:space="preserve">vnciarum, quod
              <lb/>
            expurgatum & </s>
            <s xml:id="echoid-s1265" xml:space="preserve">ad aurum purum reductum, amiſerit ex priſtina
              <lb/>
            grauitate nempe ex 24, vncijs, quatuor vncias, ita vt remanſerint
              <lb/>
            tantum 20, vnciæ auri puri, reliquum vero vel eu anuerit in fumum,
              <lb/>
            vel fuerit alterius metalli. </s>
            <s xml:id="echoid-s1266" xml:space="preserve">Totum igitur illud corpus aureum ab
              <lb/>
            initio propoſitum, ſi adbuc intelligatur tale quale fuit ante expurga-
              <lb/>
            tionem, appellabitur 20. </s>
            <s xml:id="echoid-s1267" xml:space="preserve">partium, ſeu, (vt vulgo dicitur) di 20. </s>
            <s xml:id="echoid-s1268" xml:space="preserve">ca-
              <lb/>
            ratti. </s>
            <s xml:id="echoid-s1269" xml:space="preserve">eo quod tota illa maßa mista, 20. </s>
            <s xml:id="echoid-s1270" xml:space="preserve">tantum vncias auri puri con-
              <lb/>
            tinuerit. </s>
            <s xml:id="echoid-s1271" xml:space="preserve">Immo non ſolum illa maſſa auri, ſed etiam illa cuius ipſa
              <lb/>
            fuiſſet pars, vel quæ ipſius fuiſſet quæcunque pars dicetur 20, par-
              <lb/>
            tium. </s>
            <s xml:id="echoid-s1272" xml:space="preserve">Neque enim in alligationibus metallorum, alia est alli-
              <lb/>
            gatio partium, alia totius, ſed vtrorunque vna eademque eſt qua-
              <lb/>
            litas.</s>
            <s xml:id="echoid-s1273" xml:space="preserve"/>
          </p>
          <p style="it">
            <s xml:id="echoid-s1274" xml:space="preserve">Et hoc est quod Aurifices in inuestigatione qualitatis auri ob-
              <lb/>
            ſeruant. </s>
            <s xml:id="echoid-s1275" xml:space="preserve">Nonenim purificant totum corpus propoſitum, ſed ali-
              <lb/>
            quam eius particulam etiam perexiguam, quam ſolam ad aurum pu-
              <lb/>
            rum reducunt. </s>
            <s xml:id="echoid-s1276" xml:space="preserve">hac enim reducta, non ſolum recte definiunt cuius
              <lb/>
            fuerit qualitatis particula illa purificata ante purificationem; </s>
            <s xml:id="echoid-s1277" xml:space="preserve">ve-
              <lb/>
            rum etiam cuius fuerit qualitatis, & </s>
            <s xml:id="echoid-s1278" xml:space="preserve">quot partium fuerit illud cor-
              <lb/>
            pus, à quo eadem particula detracta fuit, & </s>
            <s xml:id="echoid-s1279" xml:space="preserve">illud, quod adbuc ſu-
              <lb/>
            pereſt, diminutum ſcilicet illa parte purificata, vt in eodem ex emplo
              <lb/>
            propoſito, corporis aurei 24. </s>
            <s xml:id="echoid-s1280" xml:space="preserve">vnciarum apparet. </s>
            <s xml:id="echoid-s1281" xml:space="preserve">Eius enim quali-
              <lb/>
            tatem ſi forte aurifices inuestigare velint, detrabent ex eo particu-
              <lb/>
            lam, verbi gratia, vnius vnciæ, vel quod idem est particulam 24.</s>
            <s xml:id="echoid-s1282" xml:space="preserve"/>
          </p>
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