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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# Lin. # gran.
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# 6 # 131
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# 4 # 172
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# 0 # 340
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# Lin. # gran. # repulſion.
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# 6 # 25 {1/2} # 156 {1/2}
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# 4 # 29 # 201
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# 0 # 44 # 384
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<
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inter eos & </
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potui, ſed ſi quædam obtineat, non erit alta, & </
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plex inverſa diſtantiarum, incipiendo ſupputationem a contactu ipſo:
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<
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tum 10. </
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Attamen non dubito, quin conſtans proportio obtineat inter diſtan-
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tias & </
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">repulſiones, modo hæ ſolæ, ſeparatæque ab omni alia cauſa
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haberentur, imo attractiones ſolæ etiam in conſtanti ratione eſſe poſ-
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ſunt, ſed turbantur forſitan a repulſionibus: </
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<
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netis vim repellentem æque oſtendit, ac attrahentem: </
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co ex eodem polo vis attrahens & </
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netum duorum ſibi amici obvertuntur, attractio præpollet repulſio-
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ni; </
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">quando inimici ſe reſpiciunt poli, repulſio ſuperat attractionem; </
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quare ſemper actio datur compoſita ex attractione & </
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de proportiones duæ componentes actionem in Experimentis obſerva-
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tam, forent ex quantitatibus notatis extricandæ a ſe invicem, ut
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ſolæ haberentur, quod difficillimum erit; </
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<
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tionem attractionis & </
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<
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itaque rerum caligine, præſtabit ſuspendiſſe adhuc judicium, & </
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dide memoraſſe obſervationes, ex quibus ſerior ſapientiorque ætas
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multa forte eruet, poſtquam plura data hoc in negotio acceperit: </
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Neque noſtrum ſilentium dedecori erit, cum ſapientiſſimi Philoſophi
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Florentini de Magnete agentes, etiam Experimenta tantummodo at-
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tulerint, nihil ratiocinii addentes, neque ullas ex iis elicientes ſeque-
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las, ne ficta pro veris, ſive hypotheſin loco demonſtrationis darent,
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carbonemque pro theſauro relinquerent.</
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<
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">Quum his Experimentis inſtitutis nullam virium proportio-
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nem inveneram, cæpi ſuspicari, an quidem unquam iis modis,
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quibus tentamina feci, poſſet virium proportio detegi in variis di-
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ſtantiis, etiamſi quædam daretur, quoniam Magnetes ambo in </
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