Descartes, René
,
Renati Des-Cartes principia philosophiae
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ſupereſt alius regularis ejus motus, quo bis in die ſin
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gulis in locis attollitur & deprimitur, interimque ſem
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per ab Oriente in Occidentem fluit. </
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cauſſam explicandam, ponamus nobis ob oculos exi
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guum illum coeli vorticem, qui Terram pro centro
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habet, quique cum illâ & cum Lunâ in maiori vortice
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circa Solem fertur. </
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EFGH Terra; 1234 ſuperficies maris, à quo, majoris
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perſpicuitatis cauſſâ, Terram ubique tegi ſupponimus;
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&s5678 ſuperficies ae
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ris mare ambientis. </
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ſideremus, ſi nulla in iſto vortice Luna eſſet, punctum
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T, quòd eſt centrum Terrae, fore in puncto M, quòd
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eſt vorticis centrum; ſed Lunâ √á exſiſtente verſus B, </
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