Alvarus, Thomas
,
Liber de triplici motu
,
1509
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De motu locali quo ad effectum tempore difformi.
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0146
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146
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titulus queſtiõis falſus. </
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>
<
s
xml:id
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xml:space
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">Arguitur añs: et pono ca-
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ſum / a. mobile in prima parte proportionali ꝓ-
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portione dupla huius hore moueat̄̄ aliquantuluꝫ
<
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velociter: et in ſecunda in ꝓportione ſexquialtera
<
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velocius ꝙ̄ in prima et in tertia in ꝓportione ſexq̇
<
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quarta velocius quã in ſcḋa: et ſic conſequenter ꝓ-
<
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cedendo per omnes ſpecies proportionis ſuꝑparti
<
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cularis: quo poſito talis motus eſt vniformiter dif
<
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/>
formis: et non eſt dabilis eius intenſio: nec reductio
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ad vniformitatem: igitur. </
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>
<
s
xml:id
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N1E398
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xml:space
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">Arguitur minor / quia nõ
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apparet cuius intenſionis ſit ille motus niſi fuerit
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infinite: cum in infinitum velociter moueatur a. mo
<
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bile in aliqua parte proportionali temporis: igit̄̄
<
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non repertiur eius certa intenſio.</
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>
</
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<
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xml:id
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xml:space
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">dicitur.</
note
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<
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<
s
xml:id
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xml:space
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preserve
">¶ Dices et bene negando minorem: et quoniam ar-
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gumentum nihil aliud petit niſi intenſionem talis
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motus, et vniformitatem, et quomodo cognoſci de-
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beat: et inueſtigari. </
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>
<
s
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xml:space
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preserve
">Ideo dico / totalis illius mo-
<
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tus velocitas correſpondet velocitati ſecunde par-
<
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tīs ꝓportionalis: et ſic illud mobile a. in totali tem
<
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/>
pore mouetur in ſexq̇altero velociꝰ quã in prīa ꝑte
<
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/>
proportionali temporis. </
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>
<
s
xml:id
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xml:space
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preserve
">Quod ſic oſtenditur ſup
<
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poſito gratia argumenti / in prīa parte ꝓportio-
<
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/>
nali moueatur vt duo: et quelibet pars ſequēs al
<
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/>
teram cum toto reſiduo ſequenti eã excedit īmedia-
<
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/>
te precedentem ſe per vnum ſemper equaliter (vt fa
<
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/>
cile eſt intueri) illis ſuppoſitis ſic argumētor duo
<
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/>
gradus velocitatis qui ſunt per totam horam de-
<
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/>
nominant totuꝫ a. moueri vt duo in illa hora: et vnꝰ
<
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/>
gradus extenſus ſiue continuatus per totum reſi-
<
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duum a prima parte ꝓportiõali / quod eſt ſubduplū
<
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/>
ad totum tempus denominat vt dimidium: quoniã
<
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/>
ſi eſſet per totum denominaret vt vnum: ergo ī ſub
<
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/>
duplo denominat quia eſt in ſubduplo tēpore. </
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>
<
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xml:space
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">Itē
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alter gradus qui eſt in toto reſiduo a. ſecunda par
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te proportionali denominat in ſubduplo minꝰ quã
<
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ille qui eſt in toto reſiduo a prima: cum illa tempo-
<
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ra ſe habeant in proportione ſubdupla: et ſic conſe
<
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quenter: igitur totalis denominatio omnium illo-
<
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rum motuum demptis duobus gradibus extenſis
<
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per totam horam componitur ex infinitis cõtinuo
<
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ſe habentibus in proportione ſubdupla: ergo reſi-
<
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duum a primo eſt equale primo </
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<
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xml:space
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">Patet conſequen-
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tia ex correlario preallegato: et primum eſt vt dimi
<
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dium: ergo totus ille motus vt eſt vt vnū: et veloci-
<
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tas proueniens a duobus gradibus per totam ho
<
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/>
ram eſt vt duo: ergo totus motus adequatus illius
<
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/>
hore eſt vt tria: et velocitas prime partis id eſt quaꝫ
<
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/>
habet in prima parte ꝓportionali temporis eſt vt
<
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/>
duo: et trium ad duo eſt ꝓportio ſexquialtera: ergo
<
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/>
velocitas illius totalis motꝰ ſe habet in ꝓportiõe
<
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ſexquialtera ad velocitatē quã habet in prima ꝑte
<
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ꝓportionali: et ſic ſe habet velocitas ſecunde par-
<
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tis ꝓportionalis ad velocitatem prime / quod fuit
<
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probandum.</
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<
s
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xml:space
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">Sed contra mutando paululum ca-
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ſum: volo / a. in prima ꝓportionali hore ꝓportio
<
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ne dupla aliquantulū velociter moueat̄̄: et in ſecū-
<
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da in ſexquialtero velociꝰ quã in prima: et in tertia
<
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in ſexquitertio velocius quã in prima: et in quarta
<
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/>
in ſexquiquarto velocius quã in prima: et ſic conſe-
<
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quenter procedēdo per oēs ſpecies ꝓportionis ſu-
<
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perparticularis ſemꝑ referēdo ad primã partem.
<
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</
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<
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">Quo poſito arguitur ſic / talis motus eſt difformiṫ
<
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difformis quo ad tempꝰ: et non valet ad vniformi-
<
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tatē reduci, aut certa eius intēſio eiꝰ inueniri: igit̄̄
<
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/>
minor patet / q2 nõ apparet modus quo ille motus
<
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/>
poſſet ad vniformitatē reduci: et ſi aduerſariꝰ hoc
<
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neget, det illum modū: et in dubie facile erit calcu-
<
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De motu locali quo ad effectum tempore difformi.
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latori philoſopho illum impugnare.
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">.1. confir.</
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</
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<
s
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xml:space
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">¶ Et confir-
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matur / quia ſi aliquod mobile moueat̄̄ ī prima ꝑte
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ꝓportionali huiꝰ hore aliq̈ ꝓportiõe aliquantuluꝫ
<
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velociter: et in ſecūda in duplo velocius et in tertia
<
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in ſexquitertio velocius quã in prima et in quarta
<
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in ſexquiquīto velocius quã in prima: et in quinta
<
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in ſexquioctauo velociꝰ: et inſequēti in ſexquiduo-
<
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decimo velociꝰ: et ſic in infinitū ꝓcedendo interſca
<
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lariter ꝑ ſpēs ꝓportionis ſuꝑparticularis ↄ̨tinuo
<
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vna pĺes omittēdo: tūc taĺ motꝰ ē difformiṫ diffor
<
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mis quo ad temdus: et nõ poteſt eius certa intenſio
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dari. </
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>
<
s
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">igit̄̄. </
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>
<
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xml:space
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">Et ſic poteſt etiam formari caſus vbi inṫ
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ſcalariter ꝓcedat̄̄ per eaſdē ſpecies ꝓportiõis ſuꝑ
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particularis cõtinuo plures omittēdo duas dicen
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do ī ſexquialtero, in ſexquiquīto: ī ſexquidecīo, in
<
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ſexquidecimo ſeptimo. </
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<
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">Item ꝓcedendo per eaſdem
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ſpecies cõtinuo dimittendo plures ꝑ tres vel q̈tuor
<
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vel per .5. vel per .6. et ſic in īfinitū: et dabunt̄̄ motꝰ
<
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difformes quo ad tēpus: et tamē ipſi non poſſūt ad
<
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vniformitatē reduci: igitur:
<
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xml:id
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xml:space
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">2. confir.</
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>
</
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<
s
xml:id
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xml:space
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">¶ Cõfirmat̄̄ ſecundo et
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pono caſum / in prima parte ꝓportiõali aliquod
<
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mobile moueat̄̄ aliquantulū velociter et in ſecūda
<
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ī ſexquialtero velocius quã in prima: et in tertia in
<
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ſuperbipartiēte tertias velocius quã in prima: et
<
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in quarta in ſexquitertio velocius ꝙ̄ in prima: et in
<
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quinta in ſuꝑpartiente quartas velocius quam in
<
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prima: et in ſexta in ſexquiquarto velocius ꝙ̄ in pri
<
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ma: et ſic cõſequenter ꝓcedēdo per oēs ſpecies pro
<
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portiõis ſuperparticularis interſerēdo ſpecies ꝓ
<
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portiõis ſuprapartientis: tūc tale mobile mouet̄̄
<
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difformiter quo ad tempus: et tamē motꝰ illiꝰ vni
<
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formitas nõ poteſt venari: igit̄̄ titulꝰ q̄ſtiõis ē falſꝰ
<
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/>
<
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xlink:href
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xml:id
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xml:space
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">.3. conur.</
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>
</
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<
s
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xml:space
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">¶ Confirmatur tertio / et pono caſū / a. mobile in
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prima parte ꝓportiõali moueat̄̄ aliquãtulū: et in
<
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ſecunda in duplo plus: et in tertia in ſexquialtero
<
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plus quã in prima: et in quarta in ſuperbipartien
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te tercias plus quã in prima: et in quinta in duplo
<
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ſexquialtero plus quã in prima: et in ſexta in duplo
<
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ſuperbipartiēte tertias velocius quã ī prima et in
<
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ſeptima in triplo velocius quã in prima: et ſic cõſe-
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quenter capiēdo primoquin: et conſequen-
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ter alias .5. et ſic in infinitū. </
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>
<
s
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xml:space
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">Quo poſito illoꝝ motꝰ
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eſt difformiter difformis: et tamē illius velocitas
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non valet perſcrutari igitur.</
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>
</
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<
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<
s
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xml:space
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">In oppoſitum tamen eſt vniuerſalis
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opinio cõmuniter philoſophantiū / q̄ in hac parte
<
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multū vigoris acroboris habet </
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>
<
s
xml:id
="
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">Preterea ꝑ quēli
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bet talē motū difformem in totali tēpore adequate
<
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ꝑtranſitur aliquod ſpaciū adequate: et tale ſpaciū
<
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in tali tēpore ab aliqua velocitate vniformi natum
<
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eſt pertranſiri: igit̄̄ illa velocitas vniformis eſt tan
<
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ta quanta eſt velocitas illius motꝰ difformis quo
<
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illud ſpaciū in eodē tempore pertrãſitur adequate
<
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</
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<
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xml:space
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">Quod patet per diffinitionē motꝰ eque velocis: igi
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tur quilibet motꝰ difformis alicui vniformi corre-
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ſpondet cui equiualet / quod fuit probandum.</
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</
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<
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<
s
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xml:space
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">Pro deciſione huius queſtionis tria
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faciemus. </
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<
s
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xml:space
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">Primo aliqua notabimꝰ, ſecundo non
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nullas cõcluſiones quibꝰ facilis erit ad queſitum
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reſponſio eliciemus. </
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>
<
s
xml:id
="
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xml:space
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">Proſtremo vero reſpondebi
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mus ad argumenta in oppoſitum.</
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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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">Pro primi expeditione repetētes quo
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dãmodo ea que ſuperius iam tacta ſunt dicamus /
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duplex eſt motus difformis quod ad tempus puta
<
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difformiter difformis et vniformiter difformis.</
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>
</
p
>
<
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="
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<
s
xml:id
="
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xml:space
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">Utriuſ membri definitio ſuperiꝰ data eſt. </
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>
<
s
xml:id
="
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xml:space
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">Sꝫ mo
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tus vniformiter difformis quo ad tempꝰ adhuc du </
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