Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
archimedes
>
<
text
>
<
body
>
<
chap
id
="
N24CC8
">
<
pb
pagenum
="
371
"
xlink:href
="
026/01/405.jpg
"/>
<
p
id
="
N26D2C
"
type
="
main
">
<
s
id
="
N26D2E
">Tertiò, cùm mouetur circa axem mobilem motu recto, eſt motus mix
<
lb
/>
tus ex recto & circulari ſimilis motui rotæ; cum verò mouetur axis in
<
lb
/>
orbem, mouetur motu mixto ex duobus circularibus, & hic eſt motus
<
lb
/>
veriſſimus turbinationis. </
s
>
</
p
>
<
p
id
="
N26D38
"
type
="
main
">
<
s
id
="
N26D3A
">Quartò, cauſa motus orbis eſt prima reductio ſcuticæ, ſeu funiculi,
<
lb
/>
quæ circumagit turbinem; </
s
>
<
s
id
="
N26D40
">cauſa verò motus axis eſt extremitas funicu
<
lb
/>
li, vel ſcuticæ, quæ trochum aliquo modo, vel adducit, vel quaſi explodit,
<
lb
/>
vel expellit; </
s
>
<
s
id
="
N26D48
">adducit quidem funiculus, cuius altera extremitas etiam
<
lb
/>
adducitur; </
s
>
<
s
id
="
N26D4E
">expellitur verò trochus, cum verbere adigitur: ſed de his
<
lb
/>
paulò pòſt. </
s
>
</
p
>
<
p
id
="
N26D54
"
type
="
main
">
<
s
id
="
N26D56
">Quintò, ideò trochus mouetur motu orbis, ſeu motu circulari, quia
<
lb
/>
impetus contrarii ſimul imprimuntur, v.g.in fig.B imprimitur impetus E
<
lb
/>
per artum EHF, & F per arcum FGE: </
s
>
<
s
id
="
N26D5E
">vndè ſequitur neceſſariò motus
<
lb
/>
circularis; hinc digitis in contrarias partes exploſis turbo in orbem
<
lb
/>
agitur. </
s
>
</
p
>
<
p
id
="
N26D66
"
type
="
main
">
<
s
id
="
N26D68
">Sextò, diu durat iſte motus circularis turbinis, quia non deſtruitur
<
lb
/>
ab impetu contrario grauitationis, vt iam diximus alibi, ſed tantùm ab
<
lb
/>
affrictu ad planum illud, in quo vertitur, & à noua determinatione, quæ
<
lb
/>
ſingulis inſtantibus ponitur, quæ pro nihilo ferè haberi debet; hinc quò
<
lb
/>
vertex turbinis, politior eſt, & planum in quo ſuos gyros agit, læuiga
<
lb
/>
tius, diutiùs durat eius motus. </
s
>
</
p
>
<
p
id
="
N26D76
"
type
="
main
">
<
s
id
="
N26D78
">Septimò, aliquando dormire dicitur turbo cum celerrimè mouetur,
<
lb
/>
defixo ſcilicet axe in eodem loco, & ſitu, ratio petitur ex eo quòd ver
<
lb
/>
tex certè componitur cum ipſo plano factâ ſibi veluti inſenſibili apo
<
lb
/>
theca ſeu foſſula, cuius tenuis margo impedit motum centri; igitur mo
<
lb
/>
tus orbis vnicus eſt, igitur maior. </
s
>
</
p
>
<
p
id
="
N26D84
"
type
="
main
">
<
s
id
="
N26D86
">Octauò, verbere adigitur trochus,
<
expan
abbr
="
ipſiq́ue
">ipſique</
expan
>
imprimitur primò motus
<
lb
/>
orbis, quia lora illa ſcuticæ trocho aduoluta, vbi deinde explicantur, tro
<
lb
/>
chum ipſum circumagunt: </
s
>
<
s
id
="
N26D92
">ſecundò motus centri, quia eadem lora ad in
<
lb
/>
ſtar fundæ quaſi trochum explodunt; </
s
>
<
s
id
="
N26D98
">ſic plerumque accidit adhiberi lora,
<
lb
/>
vt longiùs ligneus orbis proijciatur; </
s
>
<
s
id
="
N26D9E
">quippe dum explicantur lora, du
<
lb
/>
plex ille motus neceſſariò imprimitur; </
s
>
<
s
id
="
N26DA4
">primus quidem, quia explicari
<
lb
/>
non poſſunt, niſi trochus circumagatur; </
s
>
<
s
id
="
N26DAA
">ſecundus verò, quia explicari
<
lb
/>
lora non poſſunt niſi in aliquam partem ferantur, & trochum ipſum tra
<
lb
/>
hant, vel ſaltem impellant; </
s
>
<
s
id
="
N26DB2
">adde quod diutiùs manet potentia applicata;
<
lb
/>
hinc maior effectus, analogiam habes in funda. </
s
>
</
p
>
<
p
id
="
N26DB8
"
type
="
main
">
<
s
id
="
N26DBA
">Nonò, quando turbo ferro inſtructus, cui funiculus aduolutus eſt, re
<
lb
/>
tentâ alterà funiculi extremitate, & explicato eodem funiculo circum
<
lb
/>
agitur; </
s
>
<
s
id
="
N26DC2
">haud dubiè maiore vi pollet hic motus,
<
expan
abbr
="
duratq́ue
">duratque</
expan
>
diù, tùm quie
<
lb
/>
funiculus eſt, longior, tùm quia maiore niſu quaſi euibratur, tùm quia
<
lb
/>
diù manet potentia applicata; </
s
>
<
s
id
="
N26DCE
">porrò duobus modis explicatur funiculus; </
s
>
<
s
id
="
N26DD2
">
<
lb
/>
primò enim adducitur, ſeu retrahitur, ex quo accidit, vt motus centri
<
lb
/>
determinetur in
<
expan
abbr
="
eãdem
">eandem</
expan
>
partem; </
s
>
<
s
id
="
N26DDD
">ſecundò non adducitur, ſed tantùm
<
lb
/>
altera extremitas retinetur; vnde fit, vt motus centri nullus ferè ſit. </
s
>
</
p
>
<
p
id
="
N26DE3
"
type
="
main
">
<
s
id
="
N26DE5
">Decimò, motus centri circularis in cam ſemper eſt partem, in quam </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>