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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ſolvit corpora, proſternit, diruit, diſſipat: </
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<
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movet, ineptus erit profligandis effluviis Magneticis? </
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<
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taque hæc corporum genus erunt? </
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<
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quemadmodum omnium aliorum fluidorum partes ſunt comparatæ,
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tum ab aliis corpuſculis in ipſa incurrentibus poterunt percuti, re-
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tardari, retrorſum pelli, aliâ determinatione moveri, veluti cor-
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pora majora; </
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<
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">flamma, cujus partes non poſſunt
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non Effluviis occurrere, propellentur, atque idcirco directio Ver-
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ſorii A B immutanda fuiſſet, eo immoto manente ſequitur non trans-
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iiſſe Effluvia e Magnete per flammam, neque operari hunc lapidem
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Fluidi aut Effluviorum quorumlibet ope.</
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<
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<
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">Si quis cuncta argumenta, quæ adverſus hypotheſin Fluidi Aerei,
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Ætherei, Effluviorum, quæ Magneticos operari effectus dicta fuerunt,
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examinaverit, comparaverit inter ſe, ſibique addiderit, non poteſt
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non eſſe convictus ab alia Magnetem regi cauſa, & </
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<
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">hæc fuiſſe quon-
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dam ex hypotheſi modo aſſumta, ab Empedocle, Democrito, Leu-
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ſippo, Epicuro, Lucretio, Carteſio, Sturmio aliiſque Clariſſimis
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Viris, nequaquam demonſtrata, corruunt igitur ſua ſponte quæcun-
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que alicui harum ſententiarum innituntur.</
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">Magnes, qui Verſorio obverſus, aut ſupra ferri limaturam reten-
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tus, attrahentium ſuarum virium præclara edebat ſpecimina, igni
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commiſſus fuit in furno anemi, ex carbonibus foſſilibus ligneisque
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exſtructo, ita ut canduerit 5 horarum ſpatio: </
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limaturæ impoſitus, nequidem leviſſimam ejus particulam attraxit,
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neque geſtavit, viribus, ut prima fronte apparebat, omnino de-
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ſtructis, quod impoſuiſſe videtur Clariſſimis Viris de Lanis & </
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leo, affirmantibus Ignem ex Magnete omnem expellere virtutem
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attrahentem; </
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cad. </
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<
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">comprobare etiam adniſus fuit, obſervando
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Magnetem radiis ſolaribus in foco ſpeculi uſtorii poſitum, quamvis
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non tam diu ut in vitrum abiret, omnem vim attrahendi amiſiſſe:
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Verſorio, 6 pollices longo, mobiliſſimoque, manifeſta </
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