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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geretur Acus nautica, vim polorum cœleſtium, & </
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vocabant, inter hos Petrus Peregrinus, Pedro de Media, Marſi-
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lius Ficinus, & </
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Theatri Chemic. </
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<
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<
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">inquit, Lapides virtutis aſtro-
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rum conſortio frui inficiabitur nemo, qui ferreum pyxidis nauticæ
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perpendiculum, Magnete confricatum, ſemper poli Septentrionalis
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ſtellam ſpectare obſervabit. </
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<
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Acûs ſupra axin mobilis, quæ non in hac regione elevatur 52 gra-
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dibus ſupra horizontem, qualis eſt poli elevatio, ſed infra eum
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deprimitur 67 gradibus.</
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<
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">Corteſius ad punctum aliquod tractorium ultra cælum recurrit;
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</
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<
s
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">quodigitur plusquam infinito â Terrâ aberit intervallo, infinitum enim
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Cœlum eſſe manifeſtum eſt, quia vacuum eſt, vacuum autem ex ſe
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nulla ſuperficie limitante donatur, nec cum ea concipi poteſt, niſi
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corpora ſimul adſint, quorum ſuperficies ſpatio terminos imponit; </
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imo infinitum eſſe cælum alio agrumento probabile reddidit Halleyus
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in Philoſ. </
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operabitur? </
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bus, neque tendit Acus vi Magnetis imbuta ad Cœlum, ſed ad Terram.</
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<
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opinabatur, non tamen quia Spiritus in eo eſſet: </
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Cœleſtis influentiæ clarum conceptum formare unquam potuerit;
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ritum eſſe negat ipſe, quodnam igitur erit corpus, vel quænam alia
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ſubſtantia? </
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ſi nihil dixiſſet.</
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<
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turi; </
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polo Septentrionali ſitis directionem Acus & </
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">Georgius Agricola Magnetem ita ſe dirigere cenſebat, ut ſe in pri-
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ſtinum ſitum, quem in fodinis occupaverat reſtitueret: </
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ſuam uterque rejeciſſet, modo cognoviſſet directionem Acus & </
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Magnetis perpetuis eſſe viciſſitudinibus obnoxiam.</
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<
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polum ita conſtitutam, ut ad ſe ſemper Ferrum Magneremque diri-
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geret; </
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