Musschenbroek, Petrus van
,
Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae
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DETUBIS CAPILLARIBUS VITREIS.
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aquam recepit ad altitudinem 2 pollic. </
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<
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<
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longitudinem 2 {1/2} pollic. </
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2 poll. </
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<
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<
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xml:space
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">ſæpius tamen modo ad 2 pollices 3, 4, vel 5 lineas.
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</
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<
s
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xml:space
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">longitudinis tandem 2 pollicum abripuit Aquam uſque ad ſummam
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oram, idque perpetuo fecit, cum abrumpendo portionem accipiebat
<
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longitudinem 1, vel {1/2} pollicis, aut 5, 4, 3, linear. </
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<
s
xml:id
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xml:space
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">in quibus ca-
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ſibus Aqua ſemper totum tubum ab imo ad ſummum uſque imple-
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vit: </
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<
s
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xml:space
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">prolixior videri in his tentaminibus poſſem, niſi cum Clariſſi-
<
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mo Geometra aliter ſtatuente res nobis fuiſlet, atque ex his ſolis
<
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hypotheſis valde ingenioſa ad explicanda tuborum capillarium phæ-
<
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nomena penitus rueret, veneratio magno debita Viro jubebat, ne
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præcipitantia aut temeritate pergeremus, ſed multis convinceremus
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potius argumentis: </
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<
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">Contemplando noſtras obſervationes detegimus
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facile quomodo in errorem labi potuiſſemus, ſiunum alterumve tan-
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tum inſtituiſſemus tentamen, nam in tentamine hujus (15) tertio,
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tubus longitudinis 11 pollic. </
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<
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xml:space
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">Aquam elevavit ad 3 {7/10} pollic. </
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<
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xml:space
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">quem-
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admodum idem tubus longitudinis 8 {1/2} pollic. </
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<
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xml:space
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">ipſam abripuit: </
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ſive longitudinem 4 {1/2} pollic. </
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<
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xml:space
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">ſive 4 pollic. </
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<
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xml:space
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">habuerit, ad eandem al-
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titudinem 3 {3/10} pollic. </
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<
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xml:space
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">aquam ſuſpendit. </
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<
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xml:space
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">& </
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<
s
xml:id
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xml:space
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">in quarto tentamine tu-
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bus 8 pollic. </
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<
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xml:space
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">& </
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<
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">6 pollic. </
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<
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xml:space
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">aquam ejuſdem altitudinis 3 pollic. </
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<
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xml:space
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">in ſe
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continuit quamobrem nonnulli dantur caſus, in quibus idem tubus
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diverſæ longitudinis, ad eandem altitudinem Aquam elevat, qui
<
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caſus procul dubio Cl. </
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<
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xml:space
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</
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<
s
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xml:space
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">Concludimus ex his Experimentis vim aut cauſam elevantem A-
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quam per totam tubi longitudinem eſſe diffuſam, quo igitur longior
<
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tubus exiſtit, eo major quantitas virium elevantium Aquam datur,
<
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niſi id enim foret, ſed modo æqualis vis, tubo brevi longove poſi-
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to, etiam ad eandem altitudinem aqua introrſum abriperetur: </
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<
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xml:space
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igitur vis elevans tubi in diſtantiam & </
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<
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xml:space
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">quidem in magnam, nam tu-
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bi 3 {1/2} pedum pars ſuperior 1 {1/2} pedum tantundem virium habet, qui-
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bus Aquam ad {1/2} pollicem attollit, cum reliqua pars 2 pedum ipſam
<
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ad 12 {1/2} pollices ſuſpendat, imo vim tubi ad majorem exporrigi di-
<
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ſtantiam quam 1 {1/2} ped. </
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<
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xml:space
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">ex aliis experimentis cum tubis multo lon-
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gioribus & </
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<
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">gracilioribus captis probari poſſet: </
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<
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xml:space
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">Occupatus fui ali-
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quamdiu in eruenda quadam proportione inter longitudinem Tubi
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& </
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<
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xml:space
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">altitudinem elevatæ Aquæ, abſque proportione enim non </
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