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: </s>
            <s xml:id="echoid-s1339" xml:space="preserve">Lux, quæ eſt ſubtiliſſimum, quod novimus, Fluidum, inci-
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            dat in vitrum, metallum, ſilicem, aquam, oleum, vel quodlibet
              <lb/>
            aliud corpus, magna ejus portio â partibus repercutietur ſoli-
              <lb/>
            dis, portio tranſibit per poros, ita ut longe rarior, poſt tranſitum
              <lb/>
            per corpora diaphana habeatur, nec tam læte fulgeat & </s>
            <s xml:id="echoid-s1340" xml:space="preserve">adhuc mul-
              <lb/>
            to rarior ſit, quæ per opacorum poros permeavit, ſi quædam trans-
              <lb/>
            ierit: </s>
            <s xml:id="echoid-s1341" xml:space="preserve">Nonne plurimum Lucis ipſa atmoſphæra aërea, vapores tenuiſ-
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            ſimi, nebulæ, nubeſve rariſſimæ intercipiunt? </s>
            <s xml:id="echoid-s1342" xml:space="preserve">Ignis ſubtilitas forſi-
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            tan non multum cedit Luci, ſupra ipſum detine Thermoſcopium mo-
              <lb/>
            biliſſimum, illico fluidum rarefieri obſervabitur; </s>
            <s xml:id="echoid-s1343" xml:space="preserve">ſed inter Ignem
              <lb/>
            & </s>
            <s xml:id="echoid-s1344" xml:space="preserve">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="echoid-s1345" xml:space="preserve">aliquo elapſo tempore lentè & </s>
            <s xml:id="echoid-s1346" xml:space="preserve">parum rarefieri obſerva-
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            bitur; </s>
            <s xml:id="echoid-s1347" xml:space="preserve">removeatur denuo corpus interpoſitum, & </s>
            <s xml:id="echoid-s1348" xml:space="preserve">Ignis abſque im-
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            pedimento ad fluidum allatus, id ſubito & </s>
            <s xml:id="echoid-s1349" xml:space="preserve">multum rarefaciet: </s>
            <s xml:id="echoid-s1350" xml:space="preserve">Spi-
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            ritus maxime volatilis, qui ulla unquam arte præparatus fuit, coër-
              <lb/>
            cetur ita in vaſis vitreis, ut non, aut parum & </s>
            <s xml:id="echoid-s1351" xml:space="preserve">lente per eorum po-
              <lb/>
            ros tranſſudet: </s>
            <s xml:id="echoid-s1352" xml:space="preserve">Aer ab omni corpore ſolido ſiſtitur, ut vel nequa-
              <lb/>
            quam vel difficilius poros pervadat: </s>
            <s xml:id="echoid-s1353" xml:space="preserve">in genere dixero, nullum eſſe
              <lb/>
            cognitum corporis genus, quin a metallis, vitris, aliisque firmis
              <lb/>
            retineatur omnino, vel pro maxima parte: </s>
            <s xml:id="echoid-s1354" xml:space="preserve">Quod ſi igitur metal-
              <lb/>
            la, aliaque ſolidiſſima corpora ſubtiles Odorum particulas, & </s>
            <s xml:id="echoid-s1355" xml:space="preserve">quoſ-
              <lb/>
            cunque volatiles Spiritus, tum Ignem & </s>
            <s xml:id="echoid-s1356" xml:space="preserve">Lucem intercipiant, vel
              <lb/>
            penitus, vel eorum maximam partem, an etiam non intercipient
              <lb/>
            aliquomodo Effluvia Magnetica, ita ut ultra impedimentum inter-
              <lb/>
            medium nequaquam tam copioſa ſint, quam forent eo ſublato? </s>
            <s xml:id="echoid-s1357" xml:space="preserve">An
              <lb/>
            autem hæc Effluvia æque facile per ſolidiſſima tranſibunt corpora,
              <lb/>
            ac ſi nihil adfuiſſet? </s>
            <s xml:id="echoid-s1358" xml:space="preserve">Opinor neminem, qui ex Experimentis inter
              <lb/>
            ſe collatis ratiocinatur, aut Mechanicos claroſque de corporibus,
              <lb/>
            eorumque fabrica conceptus format, in hanc ultimam abire poſſe
              <lb/>
            ſententiam, quæ omnem Analogiam reſpueret, & </s>
            <s xml:id="echoid-s1359" xml:space="preserve">corpora impe-
              <lb/>
            netrabilia, perfecte penetrabilia poneret: </s>
            <s xml:id="echoid-s1360" xml:space="preserve">Quamobrem ſtatuendum
              <lb/>
            erit, ſi ex Magnete Effluvia perpetuo emittantur, quæ attrahunt
              <lb/>
            alterum Magnetem aut Ferrum, hæc interceptum iri a metallo, vi-
              <lb/>
            tro, aut quocunque alio ſolidiſſimo corpore interpoſito, </s>
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