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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quidem vis eſt Attrahendi ferrum, verum nequaquam illæ virtutes, de-
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prehenduntur quas fabulatrix antiquitas Magneti attribuebat, quod foret
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aut philtrum amoris, aut poſſeſſorem gratum acceptumque faciat prin-
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cipibus, aut eloquentem: </
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<
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xml:space
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">Ceilonenſes, ab Academiæ Regiæ Pariſi-
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næ Sapientibus deſcriptos, nondum exploravi, neque matricem eo-
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rum cognovi.</
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</
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<
s
xml:id
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xml:space
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">Eſt vulgaris Magnes, Lapis plerumque tam durus, ut percuſſus
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chalybe malleove ſcintillas innumeras magnasque edat, quæ eas
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excedunt, quæ ex vulgari ſilice eliciuntur, imo ex duobus Magne-
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tibus percuſſis exit Ignis, etiamſi non tam copioſus, quam cum
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alteruter chalybe percutitur, hoc teſtante Nob. </
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<
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xml:space
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">Boyleo, qui plu-
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rimos Magnetes examinavit.</
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</
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<
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<
s
xml:id
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echoid-s355
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xml:space
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">Brevitatis ergo plurima de Magnete præteribo, tam quæ ſpectant
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tempus, quo primum inventus eſt, quam inventorem, quia hæc
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ſunt incerta; </
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<
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xml:space
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">omittamque ejus Generationem & </
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<
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">Loca natalia, in hoc
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Terrarum orbe, de his vide Normannum in New. </
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<
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compactiones & </
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">ſubſtantias, de quibus fuſe & </
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">ſæpius a plurimis autori-
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bus actum eſt, quorum nonnulli, uti Gilbertus, Kircherus, Cabeus,
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integra volumina, ſolam doctrinam magneticam comprehendentia,
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adimpleverunt.</
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<
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">Omnes effectus Magnetici huc usque cogniti ad quinque diverſas claſ-
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ſes commode reduci poſſe videntur. </
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<
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">(1) ad Actionem unius Magnetis in
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alterum. </
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xml:space
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">(2) ad Actionem Magnetis in Ferrum. </
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xml:space
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Magnetis & </
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<
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Actionem ferri in aliud ferrum Magneti affrictum vel non affrictum,
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& </
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eodem ſitu commiſſi. </
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<
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ſus eſt, in ſequentibus ſequar; </
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<
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