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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<
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xml:space
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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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>
<
s
xml:id
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xml:space
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">adhuc mul-
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to rarior ſit, quæ per opacorum poros permeavit, ſi quædam trans-
<
lb
/>
ierit: </
s
>
<
s
xml:id
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echoid-s1341
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xml:space
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">Nonne plurimum Lucis ipſa atmoſphæra aërea, vapores tenuiſ-
<
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ſimi, nebulæ, nubeſve rariſſimæ intercipiunt? </
s
>
<
s
xml:id
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xml:space
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preserve
">Ignis ſubtilitas forſi-
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lb
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tan non multum cedit Luci, ſupra ipſum detine Thermoſcopium mo-
<
lb
/>
biliſſimum, illico fluidum rarefieri obſervabitur; </
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>
<
s
xml:id
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xml:space
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">ſed inter Ignem
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& </
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<
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xml:space
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">Thermoſcopium pone vitrum, lamellam metallicam, chartam,
<
lb
/>
lignum, vel quodcunque aliud firmum corpus, intercipietur Ignis
<
lb
/>
ab his omnibus, nam fluidum in initio non adſcendet in Thermo-
<
lb
/>
ſcopio, & </
s
>
<
s
xml:id
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xml:space
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">aliquo elapſo tempore lentè & </
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>
<
s
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xml:space
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">parum rarefieri obſerva-
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bitur; </
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>
<
s
xml:id
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xml:space
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">removeatur denuo corpus interpoſitum, & </
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>
<
s
xml:id
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echoid-s1348
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xml:space
="
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">Ignis abſque im-
<
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pedimento ad fluidum allatus, id ſubito & </
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>
<
s
xml:id
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xml:space
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">multum rarefaciet: </
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>
<
s
xml:id
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echoid-s1350
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xml:space
="
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">Spi-
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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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>
<
s
xml:id
="
echoid-s1351
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xml:space
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">lente per eorum po-
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ros tranſſudet: </
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>
<
s
xml:id
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xml:space
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">Aer ab omni corpore ſolido ſiſtitur, ut vel nequa-
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quam vel difficilius poros pervadat: </
s
>
<
s
xml:id
="
echoid-s1353
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xml:space
="
preserve
">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: </
s
>
<
s
xml:id
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xml:space
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">Quod ſi igitur metal-
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la, aliaque ſolidiſſima corpora ſubtiles Odorum particulas, & </
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<
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xml:id
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xml:space
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">quoſ-
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cunque volatiles Spiritus, tum Ignem & </
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<
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xml:id
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xml:space
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">Lucem intercipiant, vel
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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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xml:id
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xml:space
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">An
<
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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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xml:space
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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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xml:space
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">corpora impe-
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netrabilia, perfecte penetrabilia poneret: </
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<
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xml:space
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">Quamobrem ſtatuendum
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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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