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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ram, quâ effuſâ, rurſuſque reſiduo aquâ, additâ, Tincturamque no-
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vam elicui, id repetens, quamdiu Tinctura oriebatur.</
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<
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<
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xml:space
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bant in ſuperficie pelliculam, quæ cryſtallorum eſt ſpecies, conſta-
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batque ex fibris rectiſſimis, tenuibus, ſibique perfecté parallelis:
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</
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<
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xml:space
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">interim ſubſedit pulvis flaveſcens ad fundum vaſis, quem collegi,
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lente & </
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<
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">caute prius educta aqua: </
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<
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xml:space
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">pulvis hic exſiccatus erat flavi
<
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coloris, ſaporis ſalſi, acidi, ſed valde adſtringentis, qui nequa-
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quam a Magnete attrahebatur.</
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<
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</
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<
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">6. </
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<
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">Alter pulvis nigreſcens, qui poſt digeſtionem & </
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<
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">ablutionem
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cum aqua ſubſederat in §. </
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">4, exſiccatus leniter, nullomodo ab ar-
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mato Magnete attrahebatur: </
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<
s
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xml:space
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">Hunc itaque in crucibulo per bihorium
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Igni fortiſſimo reverberii commiſi, frigefactus colorem nigrum ha-
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bebat, ſed continebat parva fruſta duriſſima, quæ in Igne coalue-
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rant, quaſi metallum continerent; </
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<
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xml:space
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">Totus hic pulvis a Magnete ite-
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rum attrahebatur, apparebat tamen vis in initio minor, quam pul-
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veris Magnetici ante actionem ullam Ignis.</
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</
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<
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xml:space
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">Ecce Magnetem perfecte ſolubilem in menſtruo; </
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<
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">in quodigitur ve-
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hementer operatur ſua viattrahente, cum omnis ſolutio corporum in
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menſtruo ab ejuſmodi vi, reciproca inter hæc ambo, dependeat: </
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<
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xml:space
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">unde
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mirum non eſt, vim Magneticam non apparere in alia corpora, quam-
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diu menſtruum adeſt, quod in Magnetis partes tam vehementer ope-
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ratur: </
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<
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xml:space
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">Verum menſtruo expulſo redeunt in conſpectum Vires, præ-
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cipue altero Magnete appoſito.</
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">Sumſi Spiritum Nitri more Glauberiano confectum ad ℥iij, cui
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in Phiala alta immiſi ℨiij. </
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">Magnetis in pulverem comminuti, vix
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efferveſcentia oborta fuit; </
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<
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xml:space
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">digeſſi hæc ſpatio 16 dierum, eliciebatur
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Tinctura, perfecte pellucida, ſpiſſa tamen, coloris ex viri-
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diuſculo flaveſcentis; </
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<
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luto.</
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<
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lutum exſiccavi; </
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<
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">qui deinde oppoſitus polo Magnetis præſtantiſſimi,
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hinc inde parte aliqua ſimulabat, quaſi vellet attrahi, attamen </
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