Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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EXPERIMENTA PHYSICA.
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genti vivi, quæ contingit vitrum, quam in inferiorem, quæ
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tota expoſita eſt actioni materiæ, a qua ſecunda pendet preſ-
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ſio. </
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<
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xml:space
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">Solutionem hanc fateor non mihi ita ſatisfacere,
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ut nullus mihi ſuperſit ſcrupulus; </
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<
s
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xml:space
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">nihilominus tamen per-
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ſuaſum habeo novam illam dari preſſionem, præter aëris preſ-
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ſionem, cum ob experimenta ſupra relata tum ob duo alia
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nunc referenda.</
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<
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">Laminæ metallicæ arcte inter ſe cohærent in vacuo
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licet nihil inter has detur.</
head
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<
s
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xml:space
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">QUando duæ laminæ metallicæ vel marmoreæ, quarum ſu-
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perficies ſint perfecte planæ, ad ſe mutuo applicantur,
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/>
ita cohærent, ut ſuperiore elevatâ inferior eam inſequatur,
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cujus effectus cauſa tribuitur merito preſſioni aëris in ſuper-
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ficies externas; </
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<
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">duæ mihi ſunt laminæ, quarum quævis circi-
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ter eſt magnitudinis pollicis quadrati, quæ ex materiâ con-
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flatæ ſunt, ex qua olim ſpecula formabantur, & </
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<
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xml:space
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">quæ ita jun-
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guntur, ut, licet nihil interponas, ſuperior non ſolum alte-
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ram ſuſtineat, ſed interdum etiam pondus trium librarum
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cum inferiori conjunctum; </
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<
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deſideraveris.</
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<
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">Has ita junctas & </
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">oneratas tribus libris ſuſpendi in machi-
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næ meæ recipiente, quod aëre evacuavi in tantum, ut ſuper-
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ſtes aër non preſſione ſua aquam ad altitudinem unius pol-
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licis ſuſtineret, & </
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">nihilominus laminæ meæ ſeparatæ non ſunt.</
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<
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">Idem etiam inſtitui experimentum interpoſito ſpiritu vini
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inter laminas & </
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">inveni quod in recipiente vacuo aëre ſuſti-
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nerent ſine ſeparatione eadem pondera, quæ ſuſtinebant re-
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cipiente aëre pleno.</
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<
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">Videtur id mihi manifeſte ſatis indicare magnam ſupereſ-
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ſe preſſionem in recipiente, poſtquam aëre vacuus eſt, & </
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hanc non magis quam ipſius aëris preſſionem in dubium vo-
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cari poſſe; </
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