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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tes enim nunquam aliquid de virtute amittere, quamvis eodem die
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plurima ferramenta ipſis applicata fuerint.</
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<
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">Eſt hoc profecto admodum paradoxon, nam ſi Magnes tantun-
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dem ſuæ virtutis cum Ferro communicet, quantum Ferrum recipit,
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tum ſæpe lamella magnitudinis determinatæ acquiſiviſſet {1/8} partem vi-
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rium Magnetis, adeoque 8 lamellæ vim æqualem illi, quam Ma-
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gnes habet, accepiſſent; </
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<
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xml:space
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">64 lamellæ octies vim totam Magnetis
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adeptæ fuiſſent, ſive octies orbatus fuiſſet Magnes penitus ſuâ vir-
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tute: </
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<
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">verum Magnes eandem vim ſemper conſervat, etiamſi intra
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horam non modo 64 ferramenta, ſed duplo plura ſuper eo ducan-
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tur, imo obſervante Normanno, etiamſi 10000 laminæ, Acuſve
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ipſi affrictæ fuerint.</
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<
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<
s
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">An igitur Magnes novam vim aliunde continuo acquirit, illi æ-
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qualem, quam communicat? </
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">Nam ope ex ſe emiſſorum effluvio-
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rum fieri communicatio nequit, quia horum tam æquabilis & </
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nea generatio, qualis deſideraretur cum ferramenta plurima ſubito in-
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tra anguſtiſſimum temporis ſpatium ipſi applicantur, fieri non poteſt.
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</
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<
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">Unde igitur hæ vires attrahentes, & </
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">tam æquabili copia accedent ad
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Magnetem, ut nihil ullo affrictu hic amiſiſſe videatur? </
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">An non potius
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Lapis nihil de ſua ſubſtantia communicat cum ferro, ſed tantum vim,
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in metallo ſemper latentem, excitat, & </
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<
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<
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">Nam
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nonnunquam contingit, ut Ferrum ſuper Magnete ductum, majus
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pondus elevet, quam ipſe Magnes, obſervante de la Hirio in
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L’Hiſt. </
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<
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xml:space
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">Hic virium in Ferro ſupra Ma-
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gnetem exceſſus, an ab ipſo Magnete orietur? </
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">tum minus erit in
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cauſa quam in effectu, quod repugnat: </
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">ſed ſi vis major in Ferro la-
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tuerit, quæ a Magnete in actum modo deducitur, intelligi poteſt
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aliquid, ut & </
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die vim excitaverit. </
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lis; </
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<
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">demonſtravimus autem ſupra in Chemicâ Magnetis Analyſi,
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Salem vires Magneticas coërcere, atque ad ſilentium deducere, </
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