Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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253
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xlink:href
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026/01/285.jpg
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Scholium.
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italics
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</
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<
p
id
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N1FFED
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type
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<
s
id
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N1FFEF
">Obſerua primò, ſi planum reflectens cedit, vel mobile ipſum, rem
<
lb
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aliter eſſe explicandam. </
s
>
</
p
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<
p
id
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N1FFF4
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type
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main
">
<
s
id
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N1FFF6
">Secundò tribus modis
<
expan
abbr
="
planũ
">planum</
expan
>
cedere, primò per
<
expan
abbr
="
diuiſionẽ
">diuiſionem</
expan
>
partium ſi fran
<
lb
/>
gantur; 2° per diuiſionem ſine fractione propriè ſumpta, ſed
<
expan
abbr
="
cũ
">cum</
expan
>
ceſsione. </
s
>
</
p
>
<
p
id
="
N20008
"
type
="
main
">
<
s
id
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N2000A
">Tertiò, ſine diuiſione, ſed non ſine compreſsione. </
s
>
</
p
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<
p
id
="
N2000D
"
type
="
main
">
<
s
id
="
N2000F
">
<
expan
abbr
="
Exẽplum
">Exemplum</
expan
>
primi generis habes in charta, ſeu vitro, quæ
<
expan
abbr
="
dũ
">dum</
expan
>
reflectit fran
<
lb
/>
gitur: </
s
>
<
s
id
="
N2001C
">
<
expan
abbr
="
exemplũ
">exemplum</
expan
>
ſecundi in cera molli, vel pingui terrâ; </
s
>
<
s
id
="
N20023
">tertii
<
expan
abbr
="
deniq;
">denique</
expan
>
in
<
expan
abbr
="
mẽ-brana
">men
<
lb
/>
brana</
expan
>
tenſa, vel fune tenſo: </
s
>
<
s
id
="
N20031
">ſimiliter mobile ipſum tribus modis cedere
<
lb
/>
poteſt 1°
<
expan
abbr
="
cũ
">cum</
expan
>
diuiſione partium, & fractione, ſic
<
expan
abbr
="
dũ
">dum</
expan
>
<
expan
abbr
="
vitrũ
">vitrum</
expan
>
à marmore refle
<
lb
/>
ctitur in mille partes abit.2° ſine fractione, ſed non ſine depreſsione; ſic
<
lb
/>
plumbum deprimitur in corpus durum impactum, aut cera mollis. </
s
>
<
s
id
="
N20047
">3° ſine
<
lb
/>
diuiſione, ſed
<
expan
abbr
="
nõ
">non</
expan
>
ſine aliqua compreſsione, ſic veſicca inflata reflectitur. </
s
>
</
p
>
<
p
id
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N20050
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type
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main
">
<
s
id
="
N20052
">Itaque duo ſunt planorum genera. </
s
>
<
s
id
="
N20055
">Primum eſt eorum, quæ non cedunt
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lb
/>
præ duritie. </
s
>
<
s
id
="
N2005A
">Secundum eorum, quæ cedunt vel per fractionem, vel per de
<
lb
/>
preſsionem, vel per compreſsionem: </
s
>
<
s
id
="
N20060
">per fractionem dupliciter; </
s
>
<
s
id
="
N20064
">primò ſi
<
lb
/>
alterantur tantùm aliquæ partes minutiores, vt fit in molliori lapide; </
s
>
<
s
id
="
N2006A
">
<
lb
/>
Secundò ſi per fractionem corpus diuidatur in partes notabiles, vt fit in
<
lb
/>
vitro, glacie; adde totidem genera mobilium. </
s
>
</
p
>
<
p
id
="
N20071
"
type
="
main
">
<
s
id
="
N20073
">Obſerua tertiò eſſe tres alias combinationes; </
s
>
<
s
id
="
N20077
">vel enim mobile reflecti
<
lb
/>
tur à mobili, ſed non pellitur à plano, & hæc eſt pura reflexio; vel pellitur
<
lb
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à plano ſine motu præuio, vel ſimul reflectitur, & pellitur à plano, quod
<
lb
/>
ſimul mouetur. </
s
>
<
s
id
="
N20081
">Obſerua 4°
<
expan
abbr
="
cũ
">cum</
expan
>
mouetur corpus reflectens à mobili im
<
lb
/>
pacto tres eſſe quoque
<
expan
abbr
="
cõbinationes
">combinationes</
expan
>
, vel enim cum mouetur corpus refle
<
lb
/>
ctens, reflectitur, ſeu retroagitur mobile impactum, vel
<
expan
abbr
="
cõſiſtit
">conſiſtit</
expan
>
, ſeu quie
<
lb
/>
ſcit, vel non retroagitur, ſed idem iter proſequitur. </
s
>
<
s
id
="
N20096
">Obſerua 5°
<
expan
abbr
="
cū
">cum</
expan
>
ſint
<
lb
/>
quinque veluti ſtatus corporis reflectentis; </
s
>
<
s
id
="
N200A0
">nam vel eſt molle, vel preſsi
<
lb
/>
bile, vel durum vel fragile, vel friabile, & totidem ſtatus mobilis, eſſe 25.
<
lb
/>
combinationes, vt patet ex regula combinationum, in quo non eſt diffi
<
lb
/>
cultas; igitur deinceps conſiderabo reflexionem ratione potiùs materiæ
<
lb
/>
corporis, tùm reflexi, tùm reflectentis, ſit ergo. </
s
>
</
p
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<
p
id
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N200AC
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type
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main
">
<
s
id
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emph
type
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center
"/>
<
emph
type
="
italics
"/>
Theorema
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emph.end
type
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italics
"/>
51.
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type
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center
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<
p
id
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N200BA
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type
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main
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<
s
id
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N200BC
">
<
emph
type
="
italics
"/>
Deſtruitur impetus in reflexione ex multis capitibus
<
emph.end
type
="
italics
"/>
: primò, ratione diuer
<
lb
/>
ſæ determinationis, ſi talis eſt vt aliquid impetus ſit fruſtrà, ſuppoſita
<
lb
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etiam perfecta duritie mobilis, & plani & figura apta. </
s
>
<
s
id
="
N200C9
">Secundò, ratione
<
lb
/>
diuiſionis partium vel plani, vel mobilis, vel vtriuſque; </
s
>
<
s
id
="
N200CF
">ſi enim alteran
<
lb
/>
tur partes, fit quaſi foſſula, quam ſenſim ſubit mobile, cumque ſingulis
<
lb
/>
inſtantibus ſit noua difficultas ſuperanda, ſemper inde imminuitur impe
<
lb
/>
tus: </
s
>
<
s
id
="
N200D9
">adde quod minor eſt determinatio plani quod cadit; </
s
>
<
s
id
="
N200DD
">igitur minor
<
lb
/>
eſt motus reflexus; </
s
>
<
s
id
="
N200E3
">igitur plùs impetus eſt fruſtrà; </
s
>
<
s
id
="
N200E7
">igitur plùs deſtruitur; </
s
>
<
s
id
="
N200EB
">
<
lb
/>
ſi autem planum vel ipſum mobile propter fragilitatem in partes diſsi
<
lb
/>
liat, etiam deſtruitur aliquid impetus; Tertio ratione impreſsionis;
<
lb
/>
Quarto ratione compreſsionis; Quintò ratione repulſionis; Sextò ra
<
lb
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tione liberioris ceſsionis; ſed hæc omnia minutiùs videntur eſſe ex
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plicanda. </
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