Ghetaldi, Marino
,
Marini Ghetaldi Promotvs Archimedis sev de varijs corporum generibus grauitate & magnitudine comparatis
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ARCHIMEDES.
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ſcrupulorum; </
s
>
<
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xml:space
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">& </
s
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<
s
xml:id
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xml:space
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">banc particulam excoquent ad qualitatem vſque
<
lb
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auripuri. </
s
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<
s
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xml:space
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">Et ſi quidem inuenerint, ex priori grauitate 24. </
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<
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xml:id
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xml:space
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">ſcru-
<
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pulorum, deperiſſe nibil: </
s
>
<
s
xml:id
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xml:space
="
preserve
">pronunciabunt aurum illud, boc est, non
<
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/>
ſolum particulam illam excoctam, ſed etiam illud à quo fuit detra-
<
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/>
cta, nec non & </
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>
<
s
xml:id
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xml:space
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">illud quod reman ſit post ſubtractionem eſſe velfuiſ-
<
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ſe aurum primæ qualitatis ſeu 24, partium, vel quod idem est au-
<
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num purum. </
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>
<
s
xml:id
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xml:space
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">Sivero deprebenderint grauitatem diminutam, ver-
<
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bi gratia, nunc eſſe 20. </
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<
s
xml:id
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xml:space
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">ſcrupulorum, quæ ante defæcationem fuit 24:
<
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</
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<
s
xml:id
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xml:space
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">dicturi ſunt aurum propoſitum 24. </
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<
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">vnciarum fuiſſe 20. </
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<
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">partium & </
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<
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<
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illud quod remanſit eſſe 20. </
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<
s
xml:id
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xml:space
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">partium, & </
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>
<
s
xml:id
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xml:space
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">denique particulam expur-
<
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gatam nunc quidem eſſe aurum purum, fuiſſe vero particulam auri
<
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20. </
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<
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xml:id
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">partium.</
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<
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xml:space
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</
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<
s
xml:id
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xml:space
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">Et eodem modo pronunciabunt de quibuſcunque alys auri quali-
<
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atibus, ſecundum partes auri puri, quas in qualibet maſſa auri in-
<
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/>
uenerint, eaſque vigeſimas quartas totius grauitatis, non magnitu-
<
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dinis. </
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>
<
s
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xml:space
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">Nam cum in bac comparatione qualitatum, ſeorſim babea-
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tur ratio partium auri, & </
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<
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">ſeorſim metallorum alligatorum; </
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<
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">manife-
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stum est ſi grauitas totius corporis intelligatur diuiſa in 24. </
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<
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xml:id
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xml:space
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">partes
<
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æquales, ex quibus 20. </
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<
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">ſint auri, duæ argenti, & </
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<
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">duæ æris; </
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<
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">quamli-
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bet partem auri cum qualibet parte argenti & </
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<
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xml:id
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xml:space
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">æris collatam, magni-
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tudine eſſe minorem; </
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<
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">& </
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<
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xml:space
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">ſimiliter partem argenti minorem parte,
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æris; </
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>
<
s
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xml:space
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">propterea quod aurum omnia reliqua metalla ſuperet grauita-
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te quemadmodum & </
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>
<
s
xml:id
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xml:space
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">argentum ipſum æs, vt constat experientia.
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</
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<
s
xml:id
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xml:space
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">atque binc constat quam apte ac conuenienter Aurifices vtantur
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vocabulo partium. </
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<
s
xml:id
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xml:space
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">bac enim ratione eodem numero exprimunt vnam
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quamque qualitatem auri cuiuslibet maſſæpropoſitæ. </
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<
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xml:space
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">Sed nunc ad
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ſecundum veniamus & </
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<
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">modum alligationis quem ijdem obſeruant
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breuiter adnotemus.</
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<
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">Inter varias autem & </
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<
s
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xml:space
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">multiplices auri compoſitiones quibus
<
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cum alijs metallis alligari potest, eam retinuere aurifices, quam diu-
<
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turna experientia deprebenderunt omnibus alijs eſſe commodiorem,
<
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eam nimirum quæ ab auri ſimilitudine vel minimum diſcedat; </
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<
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lis eſt quæ ſolius argenti atque æris mixtione perficitur. </
s
>
<
s
xml:id
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xml:space
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">Et quidem
<
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ſi partes auri excipias, æris atque argenti partes, quæ auro ſunt per-
<
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miſcendæ ſemper volunt eſſe æquales in grauitate: </
s
>
<
s
xml:id
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">propterea quod
<
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eadem experientia Magiſtra didicerunt bunc eſse mixtionis modum
<
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longe optimum.</
s
>
<
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xml:id
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</
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<
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<
s
xml:id
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xml:space
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">Quando ergo aurifices volunt producere aurum cuiuſcunque.
<
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</
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<
s
xml:id
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xml:space
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">qualitatis, accipiunt tot partes auri puri æquales, quot partium fu-
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turum eſt aurum producendum, pauciores tamen partibus 24, &</
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