Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. I. CAP. XXIX.
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ratione, ſunt lineæ Cd, Cd, & </
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ſe ut velocitates . </
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næ ex ictibus eandem cum velocitatibus, quibus in obicem
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incurrit, proportionem ſequuntur.</
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<
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6.</
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aliquo in loco firmatum, & </
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<
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fig. 10.</
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tum neceſſe eſt, ut color magis ſit intenſus; </
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bus eburneus cadendo impingat, pars globi, quæ plana
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facta ſeſe lapidi applicat, maculam circinnatam in hujus ſu-
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perficie relinquit. </
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licum, & </
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dum prioris quadrupla, & </
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altitudine ſex pedum & </
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& </
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ſunt inter ſe, ut unum, duo, & </
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ne ſunt maculæ E, F, & </
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ctangula DAB, DBC, in quibus latera DA, AB, BC
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ſunt æqualia inter ſe & </
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actiſſime æqualis erit diametro maculæ F, & </
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metro maculæ G, unde conſtat propoſitum .</
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2, El, XI@.</
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ravimus in puncto medio, non attendendo ad curvaturam ipſius fibræ dum
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agitatur, quo demonſtrationes de comparandis variarum fibrarum vibratio-
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nibus non mutatur, fi autem tempus ipſum vibrationis cujuſcunque detegen-
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dum eſſet, quod fit determinando longitudinem penduli eodem tempore vi-
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brationes peragentis cum fibra, curvatura hæc conſideranda foret; </
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tempore hìc non agam, neque de curvâ elaſticâ in n. </
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in hiſce uſus Methodorum fluxionum directæ & </
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ipſa Elementa Phyſices ſpectare mihi non videtur.</
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