Musschenbroek, Petrus van
,
Physicae experimentales, et geometricae de magnete, tuborum capillarium vitreorumque speculorum attractione, magnitudine terrae, cohaerentia corporum firmorum dissertationes: ut et ephemerides meteorologicae ultraiectinae
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DE MAGNETE.
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corpus filorum repulit Boreum, tenuit immobilem ſuſpenſumque
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polum Auſtralem. </
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circa ſe mutuo, quæ ambo attraxerant uno extremo polum Boreum,
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altero Auſtralem, & </
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Verſoria faciunt: </
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<
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">hæc in unum contorta & </
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<
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">bifido deſinentia capi-
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te, uno extremo polum Verſorii Boreum attraxerunt, altero ex-
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tremo repulerunt, utroque tamen ſui extremo repulerunt polum
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Verſorii Auſtralem: </
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">media parte ſuæ longitudinis obverſa cuſpidi
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Boreæ Verſorii, eam tenuerunt immobilem, nec attrahentia nec re-
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pellentia; </
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">attrahebant nihilominus cuſpidem Auſtralem: </
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Experimentum illius indolis, ut non facile intelligatur, quamvis
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clare deſcriptum, niſi quis ipſe repetierit, variiſque exploraverit
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tentaminibus.</
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">Filum ferreum, ſuper Magnete ductum, 4 longum pollices, al-
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tera ſui extremitate repellebat utrumque Verſorii polum, alterâ at-
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trahebat Boreum, fugabat Auſtralem: </
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">extremum, quod utrumque
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polum repulerat, ſupra lapidem malleo percuſſum & </
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gabat, ſed vi imbecilli, polum Boreum Verſorii, attrahebat Au-
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ſtralem: </
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">alterum fili extremum etiam applanatum malleo attrahebat
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polum Boreum, repellebat exigua vi Auſtralem, intermedia fili
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portio donabatur duobus punctis conſequentibus, quorum unum
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repellebat, alterum attrahebat cuſpidem Verſorii Boream. </
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</
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xml:space
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">Ducto hoc filo ſuper Magnetis polo Auſtrali, alterutra extremitas
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obſervabatur allicere polum Verſorii Boreum, altera Auſtralem; </
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tum percuſſo medio vi mallei, & </
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pollicis, permanſit eadem in utraque extremitate vis directrix, ſed
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multum debilitata, neque intermedia longitudo punctis conſequen-
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ribus donata videbatur.</
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extremo attrahebant polum Verſorii Boreum, altero Auſtralem, </
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