Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. I. CAP. V.
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<
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<
s
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xml:space
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id eſt, per lineas rectas tendunt ad ſingulas vitri particulas, quarum diſtantia
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non ſuperat illam ad quam vitrum & </
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<
s
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xml:space
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<
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<
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<
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fig. 5.</
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vitri ſuperficies AB; </
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<
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<
s
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">hæc ad vitrum tendit per lineam CD, ad
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ſuperficiem perpendicularem; </
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<
s
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xml:space
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pore æquali vi tendit ad omnia puncta in ſuperficie æqualiter cum e à D di-
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ſtantia, id eſt in cir cumferentia circuli poſita, cujus diameter eſt e f: </
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<
s
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harum omnium virium æqualitatem non poterit punctum magis ad punctum u-
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num ferri, quam ad aliud; </
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<
s
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">ideo, omnibus viribus ſimul agentibus, par-
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ticula etiam trahitur per CD. </
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<
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xml:space
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in aquæ particulam agentibus applicando conſtabit, hanc ad vitrum tendere per
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lineam ad ſuperficiem bujus perpendicularem.</
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<
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</
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<
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<
s
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xml:space
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">Detur ſuper plano vitreo AB gutta G. </
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<
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fig. 6.</
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diſtantes ad hoc directe tendunt, particulaſque cum quibus cohærent ſecum
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trahunt, unde in gutta oritur motus ſimilis illi, qui in gutta daretur, ſi plano
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CD ad AB parallelo hoc verſus premeretur; </
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<
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deret quaqua verſum, & </
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<
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</
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</
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<
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<
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<
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xml:space
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">huic pro parte immergatur perpendiculariter
<
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<
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vitreum planum FD, cujus craſſitiem hic repræſentamus. </
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<
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<
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fig. 7.</
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trahitur, quo premitur juxta directionem BD , & </
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<
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ſuper plano ſeſe expandere ; </
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<
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<
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D, motibus contrariis infra ſuperficiem ſeſe mutuo deſtruentibus; </
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ideo aqua, & </
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<
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turque ita aqua a vitro, ut pondus aquæ elevatæ valeat vim qua elevatur.</
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<
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<
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aqua in CDG ſolâ vi qua particulæ in C ſurſum pelluntur: </
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<
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quieſcit, vires, quibus aqua inter C & </
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<
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tur , ſeſe mutuo deſtruunt: </
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ſum pellitur. </
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<
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ſuperficiei juxta quam aqua adſcendit, menſuratæ, ad altitudinem ad quam aqua
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pertingit, in linea ad ſuperficiem ipſius aquæ parallela: </
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<
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ſequitur pondus aquæ elevatæ.</
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facile deducitur. </
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<
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ræ aquæ elevatæ ; </
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">& </
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<
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merſis ad inſtar diametri creſcit aut minuitur.</
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<
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<
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</
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<
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x A ad d
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x a ; </
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<
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x A, d
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x
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El. XII.</
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:</
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, & </
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<
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A, a :</
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</
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<
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<
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ſuperficie aquæ; </
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fig. 7.</
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