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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porum: </
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">Lux, quæ eſt ſubtiliſſimum, quod novimus, Fluidum, inci-
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dat in vitrum, metallum, ſilicem, aquam, oleum, vel quodlibet
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aliud corpus, magna ejus portio â partibus repercutietur ſoli-
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dis, portio tranſibit per poros, ita ut longe rarior, poſt tranſitum
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per corpora diaphana habeatur, nec tam læte fulgeat & </
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<
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to rarior ſit, quæ per opacorum poros permeavit, ſi quædam trans-
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ierit: </
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<
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xml:space
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ſimi, nebulæ, nubeſve rariſſimæ intercipiunt? </
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<
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xml:space
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">Ignis ſubtilitas forſi-
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tan non multum cedit Luci, ſupra ipſum detine Thermoſcopium mo-
<
lb
/>
biliſſimum, illico fluidum rarefieri obſervabitur; </
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<
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& </
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<
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xml:space
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">Thermoſcopium pone vitrum, lamellam metallicam, chartam,
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lignum, vel quodcunque aliud firmum corpus, intercipietur Ignis
<
lb
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ab his omnibus, nam fluidum in initio non adſcendet in Thermo-
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ſcopio, & </
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>
<
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bitur; </
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xml:space
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pedimento ad fluidum allatus, id ſubito & </
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xml:space
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ritus maxime volatilis, qui ulla unquam arte præparatus fuit, coër-
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cetur ita in vaſis vitreis, ut non, aut parum & </
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<
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ros tranſſudet: </
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<
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xml:space
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quam vel difficilius poros pervadat: </
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<
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xml:space
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">in genere dixero, nullum eſſe
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cognitum corporis genus, quin a metallis, vitris, aliisque firmis
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retineatur omnino, vel pro maxima parte: </
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xml:space
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la, aliaque ſolidiſſima corpora ſubtiles Odorum particulas, & </
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cunque volatiles Spiritus, tum Ignem & </
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penitus, vel eorum maximam partem, an etiam non intercipient
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aliquomodo Effluvia Magnetica, ita ut ultra impedimentum inter-
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medium nequaquam tam copioſa ſint, quam forent eo ſublato? </
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<
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autem hæc Effluvia æque facile per ſolidiſſima tranſibunt corpora,
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ac ſi nihil adfuiſſet? </
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<
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">Opinor neminem, qui ex Experimentis inter
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ſe collatis ratiocinatur, aut Mechanicos claroſque de corporibus,
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eorumque fabrica conceptus format, in hanc ultimam abire poſſe
<
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ſententiam, quæ omnem Analogiam reſpueret, & </
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<
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netrabilia, perfecte penetrabilia poneret: </
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erit, ſi ex Magnete Effluvia perpetuo emittantur, quæ attrahunt
<
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alterum Magnetem aut Ferrum, hæc interceptum iri a metallo, vi-
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tro, aut quocunque alio ſolidiſſimo corpore interpoſito, </
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