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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agunt, & </
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euntes, proportionem turbare poſſent: </
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netem unum activum, & </
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ſpes quædam affulgebat detegendi melius virium proportionem, ve-
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rum ejusmodi Magnes iners eſſe tantum poterat ferrum purum bo-
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numque, recenter ex Igne extractum, quod nequaquam ulla vi Mag-
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netica foret imbutum, non arreptum aut percuſſum forcipe ferreo, ſed
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leniter & </
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<
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cum Magnete & </
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<
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">Fui in hiſce Experimentis inſtituendis deſcribendisque ad tædium
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usque prolixus, ſed non abſque ratione; </
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">fieri enim potuiſſet, ut in
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uno deciperer, errorem autem agnoſcerem in altero: </
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<
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virium Magneticarum proportionem aliam aſſumſit Philoſophorum,
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qui unquam extiterunt, princeps Iſacus Newtonus, non oportebat,
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ut perfunctorie hoc negotium tractarem, paucisque contentus eſſem
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Experimentis: </
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benti contiguum eſt, attractio longe fortior ſit, quam cum vel mi-
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nimo intervallo ſeparatur ab invicem, vires particularum trabentis,
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in receſſu corporis attracti, decreſcere in ratione plusquam duplicata
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diſtantiarum a particulis: </
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368. </
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">vis gravit at is diverſi eſt generis a vi Magnetica,
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nam attractio Magnetica non eſt ut materia attracta. </
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qua magis trabuntur, alia minus, plurima non trabuntur. </
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Magnetica in uno & </
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nonnunquam longe major pro quantitate materiæ, quam vis gravi-
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tatis, & </
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">in receſſu a Magnete decreſcit in ratione diſtantiæ non du-
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plicata, ſed fere triplicata, quantum ex craſſis quibusdam obſerva-
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tionibus animadvertere potui. </
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perimenta, ex quibus Newtonus hæc collegit! forſitan enim Vir ſtu-
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pendæ ſubtilitatis in Mathematicis diſciplinis methodum invenit ſepa-
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randi attractiones a repulſionibus, quarum proportionem in diſtan-
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tiæ ratione triplicata decreſcere deprehendit; </
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<
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re ulterius determinavit, nec rejicere, nec amplecti ejus ſententiam
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poſſumus; </
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<
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res Magnetis attrahentes non in tam alta ratione diſtantiarum decreſ-
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cere concluderemus.</
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