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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omnis Sal ſublimabatur, adhærens lateribus & </
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partibus Arenæ aurantii coloris miſtus, relictâ materia in fundo,
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ex fulvo atra, quæ expoſita Magneti aliquantum, ſed parum attra-
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hebatur: </
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<
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">Maſſa in aqua ſoluta, dedit ſpiſſam Tincturam coloris
<
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ferruginei, relicto craſſiori pulvere in fundo; </
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<
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echoid-s3153
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xml:space
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">ſolutio cum notabili
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efferveſcentia conjungebatur: </
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<
s
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echoid-s3154
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xml:space
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">Tinctura exſiccata non a Magnete
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attracta fuit; </
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<
s
xml:id
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xml:space
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">pulvis, qui ſubſederat, erat craſſus, conſtans ex fra-
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gmentis pluribus, duris, concretis, coloris elegantis rubicundi,
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quæ exſiccata a Magnete vehementer attrahebantur: </
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<
s
xml:id
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xml:space
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">hæc volatilia
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nondum erant a Sale facta, & </
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<
s
xml:id
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xml:space
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">ideo vim attrahentem, retinuerant;
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</
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<
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">quamobrem Sal Ammoniacus non illico eam abigit in auras, etiamſi
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majori molimine expungatur.</
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<
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<
s
xml:id
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echoid-s3160
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xml:space
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">Conſtat quoque ex præcedentibus operationibus, hanc Arenam non
<
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abire in Regulum, unde concludendum eſt, eam nihil, aut ſaltem parum
<
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Metalli in ſe habere; </
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<
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xml:id
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xml:space
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">niſi aliquod Sulphur ipſi adeo firmiter adhæ-
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reat, ut a vi ignis & </
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<
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">Salium abſorberi nequeat, quodque impediit
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quominus ad fluxionem reduci, & </
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">in Regulum abire potuerit: </
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<
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xml:space
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">Sed
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an poſtulatur metallum, ut Magnes in corpus aliquod operetur? </
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<
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la profecto eſt neceſſitas, & </
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<
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xml:space
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">alia dari quoque corpora, in quibus
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non demonſtratum eſt Ferrum eſſe, monui ſupra, quæ tamen actio-
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nem Magnetis in ſe experiuntur. </
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<
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xml:space
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">Non penitus probabilitate caret,
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in hac Arena nihil Ferri aut metalli contineri, quia non efferveſcit
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cum Spiritu Salis Marini; </
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<
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xml:space
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">nec cum Spiritu Nitri fortiſſimo, eove cum
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Aqua diluto; </
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<
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xml:space
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">nec cum Aqua forti ſimplici, nec cum Aqua forti
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duplici; </
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<
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<
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xml:space
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">nec cum Oleo Vitrioli forti, eove
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diluto cum Aqua; </
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<
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xml:space
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">imo ſive hæc Arena calcinata fuerit vel non;
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</
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<
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xml:space
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">frigida vel calida, nunquam cum memoratis Spiritibus acidiſſimis
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efferveſcit, quibuscum tamen omne Ferrum acriter efferveſcit; </
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an igitur ulla ſuſpicio Ferri latentis in hac Arena poteſt foveri?</
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<
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">cum Minii Drachmis novem,
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quæ in Crucibulo igni vehementi in furno Anemi, trium horarum
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ſpatio, commiſſæ, abiverunt in maſſam firmam, duriſſimam, valde
<
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ſpongioſam, coloris ferrei, ſuperficiei inæqualis, in qua plurimæ
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partes plumbi, in globulos coaliti, ſirmiter alteri materiei adhærebant:
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</
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<
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">Ne minimum ſignum vitri ullius conſpiciebatur, ad quod con-
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ficiendum, Experimentum inſtitueram; </
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<
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