Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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nem circuli, cujus centrum non multum ab O diſtat, ſeſe
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expandit.</
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<
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xml:space
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ut MN.</
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<
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xml:space
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">Undæ ſæpe producuntur ex motu corporis tremulo, quæ
<
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<
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etiam per circulum ſeſe expandunt, licet per lineam rectam
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corpus eat & </
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<
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dendo cavitatem format, quæ ab omni parte elevatione cir-
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cumdatur.</
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<
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<
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<
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">Undæ variæ ſeſe mutuo non perturbant, dum juxta va-
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rias directiones moventur. </
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<
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">Cujus effectus ratio hæc eſt;
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</
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<
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">quamcunque ex motu undæ figuram adepta fuerit aquæ ſu-
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perficies, in hac elevatio & </
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motus qualis in undæ motu requiritur.</
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<
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xml:space
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">Qui unquam undarum motum attente conſideravit, hæc
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omnia cum Experimentis congruere vidit.</
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<
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xml:space
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">Celeritas undarum ut determinetur, motus alius cum ha-
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rum motu analogus examinandus eſt. </
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tubo cylindrico curvo EH, ſuperetque altitudo fluidi in
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">TAB. XXXIV.
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fig. 5.</
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crure EF altitudinem in alio crure quantitate lE, quæ
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differentia in duas partes æquales ſecanda eſt in i. </
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tate ſua deſcendit fluidum in crure EH, dum æqualiter in
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tubo EH adſcendit, & </
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nit ad i, ad eandem in utroque crure datur altitudinem, & </
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in hoc ſitu ſolo fluidum poteſt quieſcere: </
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ſcendendo acquiſita motum continuat, magisque adſcendit
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in tubo GH, & </
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<
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tenus ab attritu tubi motus minuitur. </
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<
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GH magis elevatum etiam gravitate deſcendit, & </
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in tubo it & </
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rit.</
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<
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</
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eodem motu cum reliquo fluido in tubo agitatur & </
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ctu hujus quieſcit; </
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ſcens & </
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