Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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Cap. 4. poſi
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tiuam leui
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tatem noņ
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dari.</
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Cap. 4. poſi
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tiuam leui
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tatem noņ
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dari.</
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PROP. LXVI.
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Fumi non ab impetu quo eructantur ad altisſimas regiones
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perduci poſſunt, ſed minùs graues redditi ab igniculo
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rum commixtione exprimi ab ambiente aere
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poſſunt.
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<
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id
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">ET notandum eſt, quòd abſque exhalationibus
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igneis non poſſent ad inſignem altitudinem̨
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fumi particulæ eleuari, quia licèt impetus ex ſui na
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tura, quo à ligni poroſitatibus eructantur, vim per ſe
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haberet ad eas longiùs eleuandas, nihilominùs, quia
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huiuſmodi impetus facillimè debilitatur extingui
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turque à particulis aeris quieſcentibus, vel prædicto
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motu priuatis, quibus occurrunt fumi, non poſſet eius
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aſcenſus longiùs propagari, ſed citò extingueretur.
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<
s
id
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">Vlteriùs ſi re vera fumi à ligno eructati virtute im
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petus
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expan
abbr
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præcõcepti
">præconcepti</
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ad
<
expan
abbr
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tãtã
">tantam</
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<
expan
abbr
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altitudinẽ
">altitudinem</
expan
>
<
expan
abbr
="
aſcẽderẽt
">aſcenderent</
expan
>
,
<
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abbr
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nõ
">non</
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>
<
expan
abbr
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au-tẽ
">au
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tem</
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ob
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expan
abbr
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ſocietatẽ
">ſocietatem</
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>
ignearum
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abbr
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exhalationũ
">exhalationum</
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>
, ſequeretur, q̨
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<
expan
abbr
="
nõ
">non</
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>
ſemper fumus ad
<
expan
abbr
="
eãdẽ
">eandem</
expan
>
atmoſphærę ſummitatem
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aſcenderet, is enim qui per poros laterales ligni e
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greditur, impetum proiectitium tranſuerſalem acqui
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reret, & ideò proſequi ſuum motum deberet per pla
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num horizontalem, neque ab incepto itinere tanto
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pere deuiaret: ſimiliter fumus ille, qui ab infima par
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te titionis in aere ſuſpenſi exit, impetum acquirit ten
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dendi deorsùm, non ſursùm, proindeque deberet di
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rectè profluere vſque ad pauimentum, & deinceps
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non poſſet ad ſu premam aeris regionem perduci, </
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