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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jectus fuiſſet; </
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<
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">ſedatus fuit elapſo aliquo tempore hic tumultus,
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tum digeſta materia octo diebus, dedit Tincturam intenſe flavam,
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in qua totus Magnes ſolutus continebatur, abſque ullis fere fæci-
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bus; </
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<
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">hæc Tinctura non oſtendit ullam actionem in Acum nauti-
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cam.</
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<
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xml:space
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">Nob Boyleus hunc Proceſſum inchoaverat, verum non produxerat
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multum, memorat tamen ſe paucas hujus Tincturæ guttas inje-
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ciſſe infuſo Gallarum, quod abibat in atramentum nigrum, & </
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quod diverſimode poſitum apparebat cæruleum inſtar Tincturæ di-
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lutæ Chalybis.</
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<
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<
s
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xml:space
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">Tincturæ quoque huic Magnetis affudit Salem Tartari, a quo
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præcipitatio fiebat, quæ evadebat ſimilis ſolutioni Vitrioli: </
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<
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">Alteri
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parti hujus Tincturæ Magnetis immiſit Spiritum Urinæ fermentatæ,
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cujus ope acquirebat præcipitatum ex flavo rubrum: </
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<
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">Verum non
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examinavit magnus Philoſophus quaſnam vires hæc præcipitata
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continebant, & </
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<
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">idcirco longe accuratius hæc tentamina inſtituere
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tenebar.</
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<
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">Ex Tincturâ immiſſa retortæ, lento Igne elicui omnem Spi-
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ritum Salis Marini, donec remanebat materia perfecte ſicca, in qua
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operatione obſervavi Magnetem fuiſſe ſemivolatilem factum in fo-
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lutione Spiritus Salis, non enim in fundo retortæ hæſit materia
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ſicca, ſed ad ſuperiorem ejus partem & </
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<
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xml:space
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">in collum uſque adſcen-
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derat: </
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<
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">erat quoque duplicis coloris, purpureo donabatur pars in-
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fima, luteo ſuprema, ſed hic a Spiritu ſalis imprimis relictus vi-
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debatur.</
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<
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ullomodo attrahebatur a Magnete, aut Verſorium nauticum com-
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movebat. </
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igitur iterum vis Magnetica ad ſilentium reducta; </
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credebam vim fore deſtructam, neque redituram in has partes,
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quæ tamen poſtea reverſa fuit, ut in ſequentibus patebit.</
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cum qua digeſſi per biduum, prodibat Tinctura intenſe flava, ſa-
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poris acidi & </
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<
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gricans: </
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quâcum iterum illud digeſſi, ſimilemque priori acquiſivi </
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