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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<
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xml:space
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">Magnetis rotundi A B E F axis ſit C D, C polus
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Auſtralis, D Boreus, dividatur Magnes bifariam ſectione per axem
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tranſeunte, habebit pars C O A B P D polum Auſtralem in O, Bo-
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reum in P: </
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<
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X & </
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<
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ta erant, ſola mutatio in eorum axe contingit, qui fit X Z, & </
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O P, tranſeundo per medium cujuſlibet ſegmenti: </
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<
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ſectione parallelâ ad axim: </
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polare, & </
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">eodem modo conſtructum, cæteroquin videri poſſet,
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quaſi plagæ quædam, quales hic C & </
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<
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">D, ſoli forent poli, cum quod-
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libet punctum lateris A C E, aut B D F polare ſit, ſed in Magnete
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integro poli C & </
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ab utroque latere.</
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<
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">Duorum Magnetum A B, a b poli Auſtrales ſint
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A, a, Borei B, b, hi in eodem plano horizontali poſiti, ad ſe
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accedere queant, tum polus Boreus unius attrahet, ſibique junget,
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polum Auſtralem alterius: </
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pra alterum a b teneatur, & </
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vertetur, ut polus Auſtralis A ſit directe ſub polo Boreo b, & </
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lus Boreus B ſub Auſtrali a.</
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<
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">Ne alicui hæc converſio mira videatur, patebit intuenti Magnetem
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ante unitum, ſed nunc diſſectum, partes hoc ordine habuiſſe compoſi-
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tas; </
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nonne pars a adhæſiſſet parti B, atque hæ ambæ partes ſe attraxiſ-
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ſent: </
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poli nominis alterni ſe conjungent; </
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vel bini Auſtrales ſe mutuo fugabunt, hi enim nunquam natura-
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liter in Magnete cohæſerunt.</
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