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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ces in XXI. </
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<
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<
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xml:space
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corollarium elicitum: </
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<
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acum rotatilem, ſive verſorium, vulgo cen Compas naalde, non affrictam
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Magneti, obſervavi in quanam diſtantia â Magnete in cipiebat rotari
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moto Magnete, dein acum affricui Magneti, quæ viribus imprægnata
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inſtar alterius Magnetis ſe habebat, hæc acus cardiniſuo impoſita con-
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vertebatur ad diſtantiam 4. </
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<
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">pedum â Magnete rotundo, No, cum
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antea ad diſtantiam 9. </
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<
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">pollicum nondum convertebatur. </
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<
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obrem hoc Corollarium ſatis demonſtratum erit; </
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<
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">atque ſimul in eo li-
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quet, Magnetem vim ſuam ex ſe emittere extrorſum ad majorem
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diſtantiam, quam Ferrum purum, id autem vires ad majus inter-
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vallum ejaculare, poſtquam Magnetem attigit.</
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<
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plorarem quænam proportio inter vim attrahentem Magnetis & </
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<
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ſtantias daretur; </
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mus, atque examen incipiamus a diſtantia 12. </
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<
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3. </
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<
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">lineas, animadvertemus numeros, exprimentes magnitudinem
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attractionis, eſſe fere in ratione inverſâ diſtantiarum, a quâ pro-
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portione tamen abludunt attractiones in minoribus & </
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<
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diſtantiis obſervatæ, incipiamus enim calculum a diſtantia 12. </
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nearum, minorem verſus pergendo, tum numeros in inverſa ratione
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diſtantiarum erutos deprehendemus ſequentes.</
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Diſtantiæ \\ in Lineis # Numeri \\ juxta Calculum # Attractiones \\ obſervatæ
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12 # 35 # 35
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11 # 38 {1/11} # 37
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10 # 42 # 43
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9 # 46 {2/3} # 47
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8 # 52 {1/2} # 57
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7 # 60 # 66
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6 # 70 # 76
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5 # 84 # 96
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4 # 105 # 109
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3 # 140 # 131
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