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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ſunt, unumque ſæpe in corpora quædam operatur, alterius vi in
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ea abſolute ſilente; </
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Proceſſibus: </
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<
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xml:space
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">Sumſi igitur novum pulverem Magneticum, ſed ex
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eodem Magnete, qui præcedentibus & </
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<
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operationibus inſerviit; </
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xml:space
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">huic addidi Arſenici ana ℨiij, ambos pul-
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veres diu & </
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<
s
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xml:space
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">bene miſcui, incluſos phialæ vitreæ expoſui igni are-
<
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næ bihorii ſpatio, omne Arſenicum ſublimatum fuit, magnaque e-
<
lb
/>
jus pars ex collo phialæ avolavit, relinquens in fundo pulverem Ma-
<
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gnetis, nullo modo immutatum, copiâ, colore, aut vi attractrice
<
lb
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reſpectu Verſorii, aut alterius Magnetis: </
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<
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xml:space
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diſcimus, niſi Arſenicum non agere in Magnetem.</
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matur, arbitrabar Magnetem vel partim vel penitus volatilem reddi-
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tum iri, ſi cum hoc Sale urgeretur, neque ê ſpe excidi: </
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Salis Ammoniaci & </
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res diu contritos & </
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arenæ, continuato per 3 horas, quem tamen non excitaviſummum,
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cum lebes arenam continens non ſatis profunde fornaci immiſſus fue-
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rat: </
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læ cohærens, tamen mollis, & </
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olens, quæ per medium diffracta, â parte inferiori verſus ſuperio-
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ra, exhibebat aliquod ſtrata hoc ordine poſita: </
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habebat fulvum; </
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ſeum, conſtans ex miſtis partibus Magnetis nigris cum albis Salis
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Ammoniaci: </
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floribus Salis Ammoniaci albiſſimis, levibus, & </
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excitavit motus, tam attrahentes, quam repellentes.</
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liquebat Magnetem non eſſe corpus homogeneum & </
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