Marci of Kronland, Johannes Marcus
,
De proportione motus figurarum recti linearum et circuli quadratura ex motu
,
1648
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la
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εσὰ</
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levigantur: ne〈que〉 illa filamenta linteorum & minutuli ſlocci
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in compreßione uniuntur, ſuperficiem unam habentes: verùm contigui
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inter ſe manent: ita〈qué〉 linteis excußis rurſum à ſe diſiungi, & ſuperfici
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em hiſpidam reddi videmus.
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<
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>Reſpondeo illum ſitum non niſi à novo motu turbari: mo
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tum verò non
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abſq́
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; impulſu advenire. </
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<
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>Quòd ſi ergo partes
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neq;
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à ſe,
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neq;
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ab extra habeant principium motûs; neceſſe illá
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ſuperficiem, in quam terminavit motus, retinere. </
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<
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Itaq;
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lin
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tea agitata turbantur: dum ex illo motu impetum concipiunt
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particulæ, ab eo ſitu diſtrahentem. </
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<
s
>Quæ autem rigidiuſcula
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ſunt: quia in ſe ipſis habent principium motús; à compreſſio
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ne eo modo, quo arcus à curvaturá, reaſſurgunt. </
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<
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>Sicuti ve
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rò duobus modis levigatio fit;
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nimirũ
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depreſſione &
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cõpreſſio-ne
">compreſſio
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ne</
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atomorũ
">atomorum</
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; ita
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abbr
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quoq;
">quoque</
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>
duobus motibus oppoſitis turbatur: cùm
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vel eriguntur: vel partes preſſæ retumeſcunt. </
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<
s
>Superficié le viga
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tam ſequitur tanquam proprietas ſplendor: lucis nimirum uni
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tæ confertim facta evibratio. </
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<
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>Nam quæ ſuperficiem habent
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aſperam, lucem incidentem diſtrahunt & inæqualiter
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abbr
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reflectũt
">reflectunt</
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.
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<
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Neq;
">Neque</
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enim ab aliquâ parte radij uniti, ſed à ſe divulſi,
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abbr
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ſeq;
">ſeque</
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in
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terſecantes in retinam feruntur: ſinguli non niſi luce tenui ſen
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ſum afficientes. </
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An igitur inferre licet omnia, quæ luce alienâ reſplendent ſuperfici
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em habere levigatam? Nitent enim margaritæ, conchylia, opera item
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figulina vitreata, avium pennæ, atramentum, picturæ &c. in quibus
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tæmen aſperitatem notamus.
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<
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>Reſpondeo ſplendorem non niſi ex multâ luce unitâ naſci:
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multa autem fit ratione ſubiecti. nam ſubiectum magis den
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ſum plus lucis continet. </
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<
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>Corpus ergo denſiſſimum & ſummè
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politum ſplendorem habet ſummum. </
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<
expan
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Itaq;
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aurum perfectè
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levigatum præ omnibus alijs ſplendet,
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aciemq;
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oculorum </
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