Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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<
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4.progreſſio longiùs diſcedet à vera; </
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<
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id
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N1771E
">vt ſuprà iam totius repetitum fuit: </
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<
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N17722
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<
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quippe hæc progreſſio in puris inſtantibus fieri tantùm poteſt, cum ſin
<
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gulis inſtantibus noua fiat acceſſio velocitatis, in hoc enim eſt error,
<
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quòd in tota parte temporis AC ponatur æquabilis velocitas, eiuſque
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principium A, ſit æquale fini C; </
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<
s
id
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N1772D
">nam AB, & GH ſunt æquales; </
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<
s
id
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N17731
">cùm ta
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men ſit minor velocitas in A, quàm in C, niſi AC ſit tantùm
<
expan
abbr
="
inſtãs
">inſtans</
expan
>
; </
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<
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id
="
N1773B
">vnde
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tota velocitas in hypotheſi Galilei acquiſita in 4.partibus temporis aſ
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ſumptis eſt, vt triangulum AFN; </
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<
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id
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N17743
">acquiſita verò in noſtra hypotheſi eſt vt
<
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ſumma rectangulorum CB, CI, EK, EN, quæ ſumma eſt ad triangulum
<
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AFN, vt 10, ad 8. vel vt 5.ad 4. igitur maior 1/4; nam prima pars tempo
<
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ris addit triangulum ABG, ſecunda GHI. &c. </
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>
</
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<
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type
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<
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id
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N1774F
">Si tamen diuidantur iſtæ partes temporis in minores v. g. in 8. tunc
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ſumma rectangulorum erit tantùm maior 1/8; </
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<
s
id
="
N17759
">ſi in 16. (1/16) ſi in 32. (1/32); </
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<
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id
="
N1775D
">ſi in
<
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64.(11/64), cuius ſehema hîc habes; ſint enim 3.partes temporis ſenſibiles A
<
lb
/>
CDFE, & ſpatium vt triangulum AFN, ſpatia verò acquiſita in ſingulis
<
lb
/>
partibus, vt portiones trianguli prædicti, quæ ipſis reſpondent v. g. ac
<
lb
/>
quiſitum in prima parte ad acquiſitum in ſecunda tantùm, vt triangu
<
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lum ACG ad trapezum GCDI &c. </
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>
<
s
id
="
N1776F
">denique acquiſitum in temporibus
<
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inæqualibus, vt quadrata temporum v. g. acquiſitum in prima parte ad
<
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acquiſitum in duabus, vt triangulum ACG ad triangulum ADI; </
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>
<
s
id
="
N1777B
">id eſt
<
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quadratum CA ad quadratum DA; </
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>
<
s
id
="
N17781
">in noſtra verò hypotheſi, ſi velocitas
<
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/>
in tota prima parte AC ponatur vt CG æquabiliter; </
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>
<
s
id
="
N17787
">haud dubiè ſpatium
<
lb
/>
acquiſitum in prædictis 4. temporibus erit, vt ſumma rectangulorum C
<
lb
/>
B, CI, EK, EN, quæ maior eſt toto triangulo, AFN, 4. triangulis ABG,
<
lb
/>
GHI, IKL, LMN, ie eſt 1/4 totius trianguli AFN; atque ita ſumma re
<
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ctangulorum continet 10. quadrata æqualia quadrato CB, & triangu
<
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lum AFN, continet. </
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>
<
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id
="
N17795
">tantùm 8. </
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>
</
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<
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<
s
id
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">Iam verò diuidantur 4. partes temporis AF, in 8. æquales; </
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<
s
id
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N1779E
">in ſenten
<
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tia Galilei totum ſpatium erit ſemper triangulum AFN, id eſt vt ſubdu
<
lb
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plum quadrati ſub AF; </
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>
<
s
id
="
N177A6
">quæ cùm ſit 8. quadratum erit 64.& ſubduplum
<
lb
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quadrati 32. at verò ſumma rectangulorum eſt 36. id eſt continet 36.
<
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quadrata æqualia quadrato XA; cùm tamen triangulum AFN, conti
<
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neat tantùm 32. igitur ſumma prædicta eſt ad triangulum AFN, vt 36.
<
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ad 32. id eſt vt 9.ad 8. igitur ſumma eſt maior triangulo 1/8, quæ omnia
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conſtant. </
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>
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type
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">
<
s
id
="
N177B6
">Præterea diuidatur vlteriùs tempus AF in 16. æquales partes; </
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>
<
s
id
="
N177BA
">qua
<
lb
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dratum 16. cum ſit 256. accipiatur ſubduplum id eſt 128. & erit trian
<
lb
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gulum AFN, cui ſemper reſpondet totum ſpatium acquiſitum in ſenten
<
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tia Galilei; </
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>
<
s
id
="
N177C4
">at verò ſumma rectangulorum erit 136. igitur ſumma eſt ad
<
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ſummam vt 136.ad 128.id eſt vt 17.ad 16. igitur eſt maior ſumma trian
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gulo (1/16) atque ita deinceps; </
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>
<
s
id
="
N177CC
">ſi vlteriùs diuidas prædictum tempus in par
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tes minores: quot porrò erunt, antequam fiat tota reſolutio in inſtan
<
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tia, ſint enim v. g. in tempore AF inſtantia 1000000. ſumma quæ reſ
<
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pondet noſtræ progreſſioni, erit maior altera, quæ reſpondet progreſſio
<
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ni Galilei (1/1000000) quis hoc percipiat? </
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