Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 570
571 - 600
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MATHEMATICA LIB. IV. CAP. XVII.
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<
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xml:space
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">Ponamus Tellurem fluidam, memoratam ſphæroidem ac-
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quiret figuram ; </
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<
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">ſi cohæreant partes verſus centrum, non
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ſitus aliarum mutari poteſt, neque mutabitur, ſi in quibus-
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dam locis partes ad ſuperſiciem uſque cohæreant inter ſe; </
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<
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ut Maris ſuperficies neceſſario acquirat ſphæroidem figuram
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ad Polos depreſſam. </
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<
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tora ſupra Maris ſuperficiem, eleventur, continentem eandem
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ſequi figuram extra dubium eſt.</
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<
s
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">Ut nunc hanc menſuremus elevationem, id eſt quantum
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diameter Æquatoris, ſuperet Axem, ad motum Telluris cir-
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ca hunc in ſpatio 23 ho. </
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<
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ti methodo, poſitâ Tellure homogeneâ computatio inſtitui-
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tur.</
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<
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">Telluris periſeria eſt pedum Rhenolandicorum 128202185.</
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ideò in uno minuto ſecundo temporis, punctum Æquatoris per-
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currit pedes 1488.</
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<
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">; cujus arcus ſinus verſus eſt pedum o, 054,
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ſpatium quod in tali tempore ex vi centriſugâ à corpore per-
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curri poteſt.</
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<
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">Gravitate corpus, in uno minuto ſecundo, ut antea jam
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vidimus, cadendo percurrit pedes 15, 607; </
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menta inſtituta ſuere ad diſtantiam 48. </
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.</
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in pnncto A; </
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">vis centriſuga in E eſt ad vim centriſugam
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in A, ut CE, aut CA, nam parum admodum differunt hæ
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lineæ, ad AB; </
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diculari ba ad CA continuatam, relolvatur vis per A b, in
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duas per A a & </
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ad vim illam minuentem, ut CA ad AB; </
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gula rectangula, Aba, & </
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oppoſitos ad verticem æquales; </
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quatore, qua corpus in minuto ſecundo percurrit O, 054; </
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vim, gravitatem minuentem in A, in ratione duplicatâ
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radii AC ad AB, co-ſinum latitudinis AE, 48. </
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hac vi minuente corpus in uno minuto ſecundo percurrat O, 0243.</
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quare, ſi Tellus quieſceret cadendo non percurreret pedes 15, 607.</
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ſed pedes 15, 632; </
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puncta hæc non moventur. </
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currit corpus O, 054. </
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