Alvarus, Thomas
,
Liber de triplici motu
,
1509
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Tertii tractatus
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191
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us minoris ipſum eſt denſius illo minori. </
s
>
<
s
xml:id
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N22B3D
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xml:space
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preserve
">Pro quo
<
lb
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intelligendo in ſuo fundamento: et radice ponã ali-
<
lb
/>
quas concluſiones: quadam diuiſione prepoſita q̄
<
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talis eſt. </
s
>
<
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xml:id
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N22B46
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xml:space
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">¶ Corporum ꝓportionabi
<
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liū ad inuicem in raritate et denſitate: quedam ſunt
<
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equalia: quedam inequalia. </
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>
<
s
xml:id
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N22B4D
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xml:space
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">Item equalium que-
<
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dã cõtinēt equaliter de materia: quedam inequali-
<
lb
/>
ter. </
s
>
<
s
xml:id
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N22B54
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xml:space
="
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">Corporum inequalium quedam cõtinent equa-
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liter de materia quedã vero nõ. </
s
>
<
s
xml:id
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N22B59
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xml:space
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">Exēplū / vt ſi ſint duo
<
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corpora quorum vnū eſt pedale et aliud ſemipeda-
<
lb
/>
le poſſibile eſt vnū tm̄ contineat de materia ſicut
<
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/>
aliud vel vnum cõtineat plus de materia ꝙ̄ aliud.
<
lb
/>
</
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>
<
s
xml:id
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N22B63
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xml:space
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">Item corporum inequalium inequaliter contenen-
<
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tiū de materia: quedam ita ſe habent minus con
<
lb
/>
tinet minus de materia: quedã ita ſe habent mi-
<
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/>
nus continet magis de materia. </
s
>
<
s
xml:id
="
N22B6C
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xml:space
="
preserve
">Item minorum cõ
<
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tinentium minus quã maius: quoddam cõtinet mi-
<
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nus in ea ꝓportione qua eſt minus: quoddã in ma-
<
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/>
iori ꝓportione: quoddã vero in minori. </
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>
<
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xml:id
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xml:space
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">Exemplum /
<
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vt ſi ſint duo corpora quorum vnū eſt pedale aliud
<
lb
/>
ſemipedale poſſibile eſt ſemipedale cõtineat ma
<
lb
/>
teriam in duplo minorem: in triplo maiorem: et in
<
lb
/>
ſexquialtero minorē quã ↄ̨tineat pedale. </
s
>
<
s
xml:id
="
N22B80
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xml:space
="
preserve
">Itē corpo
<
lb
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rum inequaliū quorū minus continet plus de mate
<
lb
/>
ria ꝙ̄ maius. </
s
>
<
s
xml:id
="
N22B87
"
xml:space
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preserve
">quoddã cõtinet plus de materia quaꝫ
<
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maius in equali ꝓportione qua eſt minus. </
s
>
<
s
xml:id
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N22B8C
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xml:space
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">quoddã
<
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in maiori quoddã vero in minori ꝓportione quã ē
<
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minus: </
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>
<
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xml:id
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N22B93
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xml:space
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preserve
">Exēelū / vt captis pedali et ſemipedali poſſi-
<
lb
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bile eſt ſemipedale continet in duplo plus de ma
<
lb
/>
teria quam pedale: </
s
>
<
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xml:id
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N22B9A
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xml:space
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">Poſſibile ē in triplo: poſſi
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bile eſt etiam in ſexquialtero. </
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>
<
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xml:id
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N22B9F
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xml:space
="
preserve
">His diuiſionibꝰ po
<
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ſitis pono aliquas concluſiones quarum</
s
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</
p
>
<
p
xml:id
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N22BA4
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<
s
xml:id
="
N22BA5
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xml:space
="
preserve
">Prima cõcluſio eſt hec. </
s
>
<
s
xml:id
="
N22BA8
"
xml:space
="
preserve
">Corpora equa
<
lb
/>
lia equaliter continentia de materia ſunt equaliter
<
lb
/>
rara et equaliter dēſa dūmõ ſint rara et denſa. </
s
>
<
s
xml:id
="
N22BAF
"
xml:space
="
preserve
">Hec
<
lb
/>
concluſio patet ex diffinitionibus rari et denſi.</
s
>
</
p
>
<
p
xml:id
="
N22BB4
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<
s
xml:id
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N22BB5
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xml:space
="
preserve
">Secunda concluſio </
s
>
<
s
xml:id
="
N22BB8
"
xml:space
="
preserve
">Si aliqua duo in
<
lb
/>
equalia equaliter contineant de materia: minus il
<
lb
/>
lorum in eadem ꝓportione eſt denſius in qua ē mi-
<
lb
/>
nus. </
s
>
<
s
xml:id
="
N22BC1
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xml:space
="
preserve
">Probat̄̄ hec concluſio et capio duo corpora in
<
lb
/>
equalia gratia exempli pedale et ſemipedale habē-
<
lb
/>
tia equaliter de materia / et volo / ſemipedale rare
<
lb
/>
fiat quovſ ſit pedale ſine acquiſitione aut deper-
<
lb
/>
ditione materie. </
s
>
<
s
xml:id
="
N22BCC
"
xml:space
="
preserve
">quo poſito in fine illa duo corpora
<
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/>
ſunt eque rara et denſa / vt patet ex prima concluſio-
<
lb
/>
ne: et illud quod antea erat minus perdidit propor
<
lb
/>
tionem duplam denſitatis cum acquiſiuerit duplã
<
lb
/>
raritatem / vt patet per duplam punctorum diſtan-
<
lb
/>
tiam ſine acquiſitione aut deperditione materie:
<
lb
/>
igitur antea erat in duplo denſius quã ſit modo: et
<
lb
/>
per conſequens in duplo denſius quolibet equali
<
lb
/>
modo in denſitate. </
s
>
<
s
xml:id
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N22BDF
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xml:space
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preserve
">quoniam in quacun ꝓportio-
<
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ne aliquid excedit aliud in eadeꝫ ꝓportione excedit
<
lb
/>
quolibet equale illi: igitur concluſio vera:</
s
>
</
p
>
<
p
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<
s
xml:id
="
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"
xml:space
="
preserve
">Tertia concluſio </
s
>
<
s
xml:id
="
N22BEA
"
xml:space
="
preserve
">Si fuerint duo cor-
<
lb
/>
pora inequalia: et minus illorum cõtinet plus ḋ ma
<
lb
/>
teria quã maius: tunc minus eſt denſius in propor-
<
lb
/>
tione compoſita ex proportione qua maius excedit
<
lb
/>
minus: et ex proportione qua materia minoris ex-
<
lb
/>
dit materiam maioris: </
s
>
<
s
xml:id
="
N22BF7
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xml:space
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preserve
">Probatur et capio pedale
<
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et ſemipedale quod cõtinet in duplo maigs de ma-
<
lb
/>
teria quã pedale: et volo / illud ſemipedale rarefi-
<
lb
/>
at quouſ ſit bipedale: quo poſito arguitur ſic in fi
<
lb
/>
ne talis rarefactionis illud corpꝰ quod antea erat
<
lb
/>
ſemipedale eſt eque denſum adequate cum alio cor
<
lb
/>
pore pedali cū ſubdupla quãtitate duplã maṫiã cõ
<
lb
/>
tiuet: et ipſum eſt in quadruplo minus denſum quã
<
lb
/>
erat antea cum modo puncta in quadruplo plꝰ di-
<
cb
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="
Capitulum primum
"/>
ſtent etc. / igitur ipſum erat antea in quadruplo deu
<
lb
/>
ſius quã ſit modo: et per conſequens in quadruplo
<
lb
/>
denſius quolibet quod eſt modo equale ei in den-
<
lb
/>
ſitate: igitur ipſum antea cum eſſet ſemipedale erat
<
lb
/>
in quadruplo denſius illo pedali: et proportio qua
<
lb
/>
drupla eſt ꝓportio compoſita ex ꝓportione quãti-
<
lb
/>
tatis qua maius excedit minus puta dupla: et ex ꝓ-
<
lb
/>
portione qua materia minoris excedit materiam
<
lb
/>
maioris ſimiliter dupla / vt patet ex ſecunda parte
<
lb
/>
huius operis: igitur intentum. </
s
>
<
s
xml:id
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N22C1F
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xml:space
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">ſic enim vniuerſali-
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ter probabis.</
s
>
</
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>
<
p
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<
s
xml:id
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xml:space
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">Quarta concluſio </
s
>
<
s
xml:id
="
N22C28
"
xml:space
="
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">Si ſint duo corpo-
<
lb
/>
ra inequalia inequaliter continentia de materia.
<
lb
/>
</
s
>
<
s
xml:id
="
N22C2E
"
xml:space
="
preserve
">ita ī q̈cū ꝓportiõe minꝰ minus eſt ī eadē ꝓpor-
<
lb
/>
tione continet minus de materia. </
s
>
<
s
xml:id
="
N22C33
"
xml:space
="
preserve
">talia corpora ſūt
<
lb
/>
equaliter denſa. </
s
>
<
s
xml:id
="
N22C38
"
xml:space
="
preserve
">Patet hec concluſio de ſe quoniã
<
lb
/>
capto corpore pedali vniformiter denſo / manifeſtū
<
lb
/>
eſt / medietas eius eſt eque denſa ſicut totum: et ſi-
<
lb
/>
cut medietas eſt in duplo minor ita in duplo minus
<
lb
/>
continet de materia. </
s
>
<
s
xml:id
="
N22C43
"
xml:space
="
preserve
">Et iſto modo vniuerſaliter ꝓ-
<
lb
/>
babis de quibuſcun aliis proportionibus ſiue ra
<
lb
/>
tionalibus ſiue non rationalibus</
s
>
</
p
>
<
p
xml:id
="
N22C4A
">
<
s
xml:id
="
N22C4B
"
xml:space
="
preserve
">Quinta concluſio </
s
>
<
s
xml:id
="
N22C4E
"
xml:space
="
preserve
">Si ſint duo corpo-
<
lb
/>
ra inequalia: et minus contineat minus de materia
<
lb
/>
quam maius in maiore proportione quam ma-
<
lb
/>
ius excedat minus: tunc maiꝰ eſt deſius minore ī ea
<
lb
/>
ꝓportione qua ꝓportio materie ad materiam exce
<
lb
/>
dit ꝓportionē quantitatū: </
s
>
<
s
xml:id
="
N22C5B
"
xml:space
="
preserve
">Uel ſub aliis verbis ea-
<
lb
/>
dē rententa ſententia. </
s
>
<
s
xml:id
="
N22C60
"
xml:space
="
preserve
">Si duorū corporum inequa-
<
lb
/>
liū ꝓportio materie maioris ad materiam mino-
<
lb
/>
ris excedit ꝓportionē quãtitatis ad quantitatem:
<
lb
/>
maius illorum eſt denſius in ꝓportione ꝑ quã pro-
<
lb
/>
portio materie maioris ad materiã minoris exce-
<
lb
/>
dit ꝓportionē quantitatū. </
s
>
<
s
xml:id
="
N22C6D
"
xml:space
="
preserve
">Probat̄̄ hec concluſio
<
lb
/>
et capio duo corpora ſe habentia in ꝓportione du
<
lb
/>
pla / et volo / materia maioris ſit tripla ad materi
<
lb
/>
am minoris quo poſito maius eſt denſius in ꝓpor
<
lb
/>
tione ſexquialtera ꝑ quã ꝓportio tripla excedit du
<
lb
/>
plam: igr̄ cõcluſio vera. </
s
>
<
s
xml:id
="
N22C7A
"
xml:space
="
preserve
">Añs ꝓbatur: et pono / cor
<
lb
/>
pus maius condenſetur quovſ ſit equale minori
<
lb
/>
puta ad ſubduplū / quo poſito argr̄ ſic. </
s
>
<
s
xml:id
="
N22C81
"
xml:space
="
preserve
">Illud corpꝰ
<
lb
/>
quod antea erat maius eſt in triplo denſius altero
<
lb
/>
corpore quod antea erat minus eo: et ꝑ talē cõdēſa-
<
lb
/>
tionē p̄ciſe acquiſiuit duplam denſitatem: ergo ſe-
<
lb
/>
quitur / antea habebat ſexquialteram: igitur ip-
<
lb
/>
ſum erat ãtea in ꝓportione ſexq̇altera dēſiꝰ / qḋ fuit
<
lb
/>
ꝓbandū. </
s
>
<
s
xml:id
="
N22C90
"
xml:space
="
preserve
">Sequela tamē ꝓbatur / q2 qñ aliq̇d efficit̄̄
<
lb
/>
in aliqua ꝓportiõe maiꝰ reſpectu alterius: et tūc ac
<
lb
/>
quirit preciſe vnã partē talis ꝓportionis ſequitur /
<
lb
/>
iã antea habebat alterã ꝑtem: ſed tale corpꝰ acq̇-
<
lb
/>
ſiuit ꝓportionē triplã id eſt effectū eſt denſius ī pro
<
lb
/>
portione tripla: et nõ acq̇ſiuit niſi duplã: ergo ſequi
<
lb
/>
tur / iã antea habebat adequate ſexquialterã: qm̄
<
lb
/>
tripla ex dupla et ſexquialtera cõponit̄̄ adequate.
<
lb
/>
</
s
>
<
s
xml:id
="
N22CA2
"
xml:space
="
preserve
">Et iſto mõ ꝓbabis de q̇buſcū aliis ꝓportiõibus.</
s
>
</
p
>
<
p
xml:id
="
N22CA5
">
<
s
xml:id
="
N22CA6
"
xml:space
="
preserve
">Sexta concluſio </
s
>
<
s
xml:id
="
N22CA9
"
xml:space
="
preserve
">Si fuerint duo cor
<
lb
/>
pora inequalia: et ꝓportio quantitatū fuerit ma-
<
lb
/>
ior proportione materie maioris ad materiã mi-
<
lb
/>
noris. </
s
>
<
s
xml:id
="
N22CB2
"
xml:space
="
preserve
">tunc minus eſt denſius maiori in ꝓportione
<
lb
/>
qua proportio quantitatis excedit ꝓportionē ma-
<
lb
/>
terie. </
s
>
<
s
xml:id
="
N22CB9
"
xml:space
="
preserve
">Probat̄̄ hec concluſio: et volo / ſint duo cor-
<
lb
/>
pora puta pedale et bipedale: et bipedale in ſexqui-
<
lb
/>
altero plus cõtineat de materia ꝙ̄ pedale: tūc dico /
<
lb
/>
pedale eſt denſius bipedali in ꝓportione ſexqui
<
lb
/>
tertia. </
s
>
<
s
xml:id
="
N22CC4
"
xml:space
="
preserve
">quoniam ꝑ talem ꝓportionē ſexquitertiam
<
lb
/>
ꝓportio quãtitatis maioris ad quãtitatē minoris
<
lb
/>
q̄ ē dupla excedit ꝓportionē maṫie maiorꝪ ad maṫi
<
lb
/>
am minoris q̄ ē ſexq̇altera / vt ↄ̨ſtat </
s
>
<
s
xml:id
="
N22CCD
"
xml:space
="
preserve
">Probat̄̄ hoc ſic
<
lb
/>
</
s
>
<
s
xml:id
="
N22CD1
"
xml:space
="
preserve
"/>
</
p
>
</
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>
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>
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