Alvarus, Thomas
,
Liber de triplici motu
,
1509
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De motu quo ad cauſam in medio non reſiſte.
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cõſequentia intelligenti modum procedendi talis
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reſiſtentie: et vltra precedet ipſam: igitur velocius
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mouetur ꝙ̄ potētia: et ſemper antea velocius a. mo-
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uebatur ꝙ̄ modo cum cõtinuo remittat motum ſuū
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ex caſu: et potētia ſemper antea mouebatur tardiꝰ
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̄ modo: quia cõtinuo precedebat ipſum a. mouen-
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do cum maiori reſiſtētia quã a. non em̄ aliquando
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ſequebatur potentia ipſum a. punctū et poſtea pre-
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ceſſit ipſum a. patet ex quarta ſuppoſitione. </
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<
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xml:space
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ſemper antea a. velocius mouetur quam potentia:
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igitur ſemper a. precedit potentiam et ſic modo in
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inſtanti dato nõ ſunt ſimul (incipiunt enim ab eodē
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inſtanti et puncto) et ſunt in eodem inſtanti ſimul
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per te: ergo cõtradictio, non eſt igitur dicendum
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aliquando potentia intendit motum ſuū / qudd fuit
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probandum: patet ergo concluſio.</
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<
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<
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dio nõ reſiſtente fit progreſſio latitudinis reſiſten-
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tie vniformiter difformis partibiliter quo ad ſub-
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iectum modo expoſito quolibet puncto eius intrin
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ſeco cõtinuo vniformiter intendente motum ſuum
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non gradu, aut extremo remiſſiori quieſcente: po-
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tentia ſimul incipiens moueri in eodem inſtanti et
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ab eodem puncto cum tali reſiſtentia continuo in-
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tendit motum ſuum. </
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<
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xml:space
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">Et ſi pro aliquo inſtanti pro
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quo intendit motum ſuum ad aliquod punctum
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hoc eſt exiſtens in aliquo puncto, poneretur in
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puncto minus reſiſtente illius reſiſtentie. </
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<
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dius intenderet motum ſuum. </
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cõcluſionis patet ex immediate precedente. </
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batur ſecūda. </
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<
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">Latitudine reſiſtētie vniformiter dif-
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formis ad nõ gradum terminate procedente / vt po-
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nitur in caſu cõcluſionis. </
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<
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">Sit b. potentia in aliquo
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inſtanti in c. puncto ſit e. punctus in g. ꝓportione
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remiſſior c. puncto in quo e. puncto b. potentia pro
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eodem inſtanti ponatur. </
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tardius intendit motum ſuum ad e. punctum ꝙ̄ ad
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c. </
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<
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">Quod ſic oſtenditur: quia potentia b. poſita ad
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punctum c. per cõtinuam acquiſitionem minoris re
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ſiſtentie: citius acquirit aliquam proportionem
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̄ ipſa poſita ad punctum e. acquirat eandem: igit̄̄
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b. potentia tardius intendit motum ſuum ad e. pū-
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ctum ꝙ̄ ad c. / quod fuit probandum. </
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<
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">Cõſequētia ptꝫ
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ex ſe / et ꝓbatur antecedens quia poſito / pro eodeꝫ
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inſtanti pro quo b. eſt ad c. punctū potentia ei equa
<
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lis ponatur ad punctū e. illa potentia equalis ipſi
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b. tardius aliquam ꝓportionem acquirit ꝙ̄ ſit pro
<
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portio quam acquirit ad punctum c.b. potētia / igr̄
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b. potentia poſita ad punctum c. per acquiſitioneꝫ
<
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minoris reſiſtentie citius acquirit aliquã propor-
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tionem quã ipſa poſita ad punctū e. acquirat ean-
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dem. </
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<
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">Cõſequentia patet: et ꝓbatur antecedens. </
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<
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pono / cū b. eſt ad punctū c. potentia ei equalis a.
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ponatur ad punctū e. et ſit d. punctus in quo b. potē
<
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tia debet acquirere ꝓportionē h. ad quem (vt opor
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tet) c. punctus habet ꝓportionem h. et ſit f. punctus
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in quo a. potentia debet acquirere eandem ꝓpor-
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tionem h. inter que puncta e. et f. eſt etiam ꝓportio
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h. (vt oportet). </
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h. ꝓportionem quã b. / igitur ꝓpoſittū. </
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<
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">autecedēs q2 f. punctꝰ tardius attinget a. ꝙ̄ d. ipſã
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potentiã b. et in illis pūctis debent a. et b. acquirere
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ꝓportionē h. / ergo tardius acquiret ꝓportionē h.
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̄ b. / qḋ fuit ꝓbandū. </
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<
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">Sed iam ꝓbo añs videlicet /
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tardius f. attinget a. etc̈. quia f. a principio motꝰ in
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g. proportiõe minꝰ diſtat a mobili / quod inſequit̄̄ /
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quã d. diſtet a b. et continuo f. mouetur in g. proportio
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tione tardius quã d. / et tamen a. nõ mouetur in g. ꝓ-
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portione nec in maiori proportione tardius quã b. /
<
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De motu quo ad cauſam in medio non reſiſte.
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igit̄̄ nõ ita cito nec citius f. attinget a. quã d. ipſam
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potētiam b. ſed tardius / quod erat inferendū. </
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cõſequentia ex tertia ſuppoſitione huiꝰ cū ſuo cor-
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relario (applica vtpotes). </
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<
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">Iam ꝓbo primã parteꝫ
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maioris: q2 ſicut ſe habet c. ad d. ita e. ad f. ex caſu:
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igitur permutatim ſicut ſe habet c. ad e. (puta in g.
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proportione ex hypotheſi) ita ſe habet d. ad f. puta
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in g. proportione. </
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<
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">Et vltra c. ad e. eſt g. proportio et
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latitudo eſt vniformiter difformis ad non gradum
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terminata quieſcente nõ gradu: igitur cõtinuo di-
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ſtantie quantitatiue ipſius c. a nõ gradu ad diſtan-
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tiam ipſius e. ab eodem non gradu eſt g. proportio
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</
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<
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ius. </
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<
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">et vltra diſtantie ipſius c. a non gradu ad diſtã
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tiam ipſius e. etc̈. eſt proportio g. et etiam diſtantie
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ipſius d. ad diſtantiam ipſius f. eadem ratione eſt
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ꝓportio g. / igitur demendo / a diſtantia c. a nõ gra-
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du diſtantiam d. a nõ gradu, et demendo / a diſtãtia
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c. a nõ gradu diſtãtiam f. a nõ gradu que (vt cõſtat)
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ſunt partes aliarū diſtantiarū puta c. et e. a nõ gra
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du: remanentes diſtantie ſe habent in eadem g. pro
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proportione, et ſic reſidui diſtantie ipſius c. a non
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gradu ad reſiduū diſtantie ipſius e. a nõ gradu eſt
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g. proportio: ptꝫ cõſequentia ex ſeptimo correlario
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quarte cõcluſionis octaui capitis ſecunde partis.
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</
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<
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tia ipſius c. a d. et reſiduum diſtantie ipſius e. a non
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gradu eſt diſtantia ipſius e. ab f. (vt conſtat) / igitur
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diſtãtie ipſius c. a d. ad diſtantiã ipſius e. ab f. eſt g.
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proportio. </
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<
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">Et a principio motus a. eſt in e. et b. in c. /
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igitur f. in g. proportione a principio motus minꝰ
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diſtat ab a. mobili / quod īſequitur / quã d. diſtat ab
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b. / que fuit prima pars maſoris inferenda. </
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<
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batur ſecunda pars maioris: quia f. punctus in g.
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proportione eſt remiſſior d. puncto (vt ꝓbatum eſt) /
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igitur continuo in g. proportiõe tardius mouetur
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ipſo puncto d. / quod fuit ꝓbandū. </
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<
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tia ex prima ſuppoſitione huiꝰ / et ſic ptꝫ totū antece
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dens. </
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<
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in vtro extremo terminat̄̄, auxiliãtibꝰ loco a ma-
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iori: et ſecunda ſuppoſitione huius et etiam tertia.
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</
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<
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<
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motū ſuū modo dicto ad aliquē gradū reſiſtētie in
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latitudine / vt diximus mota: oīs potentia maior q̄
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ad eūdem punctū intederet motū ſuū, tardiꝰ intēde
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ret. </
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<
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">Et oīs minor velocius.
<
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Calcu.</
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<
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">Hec eſt ſeptīa cal. quã ſic
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ꝓbo primo quo ad primã partē: q2 data aliqua po
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tentia q̄ ad aliquē gradū intēdit motū ſuū ꝑ acqui
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ſitionē minoris reſiſtētie. </
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<
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xml:id
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xml:space
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">oīs maior ad eundē pun-
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ctū intēdens motū ſuū tardiꝰ illã minorē reſiſtētiã
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acquiret cõtinuo: igit̄̄ oīs maior tardiꝰ ibi intēde-
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ret motū ſuū. </
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<
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">Ptꝫ ↄ̨ña / q2 nõ aliter ibi aliq̈ potētia
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intēdit motū ſuū ꝙ̄ ꝑ cõtinuã minoris reſiſtētie ac-
<
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quiſitionē: vt patet: añs tñ ꝓbatur: quia oīs maior
<
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velocius mouet̄̄ recedendo a tali reſiſtētia et īcipiūt
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ab eodē pūcto ī eodē īſtãti: igit̄̄ illa reſiſtētia tardiꝰ
<
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attīget illã maiorē potentiã ꝙ̄ minorē: et ꝑ ↄ̨ñs tar-
<
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dius illa potentia maior acquiret illã minorē reſi-
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ſtentiã / qḋ fuit ꝓbandū. </
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<
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xml:id
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xml:space
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">Et eadē oīno eſt ꝓbatio ſe-
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cūde partis: qm̄ minor citius acquirit minorē reſi-
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ſtentiã quã maior acq̇rat eandē / ptꝫ ergo concluſio.
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<
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xml:space
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">1. correĺ.</
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<
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">¶ Ex hac cõcluſiõe ſeq̇t̄̄ ṗmo / latitudīe ſic mota / vt
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dictū eſt: quocū gradu illiꝰ dato, dabit̄̄ vna poña
<
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q̄ ita tarde ſufficit ibi intendere motū ſuū, nulla
<
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alia poteſt ita tarde intendere ſtante caſu. </
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<
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dine ſic mota. </
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<
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">Probatur / q2 ad oēm reſiſtentiã fini
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tã quãlibet ꝓportionē maioris īeq̈litatꝪ hꝫ aliqua
<
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poña (vt patet ex ſe) / igr̄ nulla eſt dabilis reſiſtentia </
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