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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tractionem paulum impediebat; </
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<
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xml:space
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">non tamen eam materiam, quæ at-
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trahitur, reddit volatilem, licet avolare queat, ut mox patebit.</
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<
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">Arena mixta fuit cum Nitro fixo, impoſitaque fornaci fuſoriæ
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ſpatio horæ non abiit in Regulum. </
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<
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xml:space
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tur â Magnete exceptâ tenui cruſta, quæ Carboni in crucibulum
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injecto adhærebat.</
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<
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<
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xml:space
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">Carbone in pulverem contu-
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ſo, atque per horam fuſoriæ fornaci immiſſa non abiit in regulum:
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</
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<
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xml:space
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">maſſa inde producta non â Magnete attrahebatur, exceptis iis par-
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tibus, quæ Carboni adhærebant.</
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<
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">5. </
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<
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">Arenæ alia pars mixta fuit cum Nitro & </
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<
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xml:space
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">floribus Sulphuris,
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quæ in fornace aliquamdiu poſita, etiam Regulum non dedit.</
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<
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</
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<
s
xml:id
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xml:space
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">Liquet ergo ex his 1°, Nitrum reddere illud volatile, quod in
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hac Arena a Magnete attrahitur, idcirco enim actionem Nitri paſſa,
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non amplius patitur Magnetis actionem in ſe.</
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<
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">Volatile autem reddi poſſe id quod attrahitur a Magnete patet
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ex hoc proceſſu.</
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<
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">Arenæ Indicæ ℨiij, miſtæ cum Salis Ammoniaci ℨiij, expoſitæ
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fuerunt in crucibulo aperto Igni modico, â quo tamen Sal Ammo-
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niacus volatilis eſt factus expulſuſque: </
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<
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bebat ℨij. </
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">cum granis 23, adeoque pondus Arenæ amiſſum fuit 37
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granorum, poſito nihil Salis in Arenâ ſuperſtes fuiſle: </
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<
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">inerant re-
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ſiduo grana majora, quam ante fuerant, coloris elegantis Cinnaba-
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rini; </
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">omnes reliquæ partes amiſſâ priori nigredine ad obſcure ru-
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brum vergebant: </
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<
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xml:space
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">Magnes ſupra hæc omnia poſitus, ductus, imo
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iis applicatus, vix aliquid attrahere potuit, dabatur tamen attractio
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obſcura: </
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<
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">edulcoratum, deinde exſicca-
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tum, non majori vi quam ante a Magnere attractum fuit: </
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feſto indicio ſimul cum Sale Ammoniaco avolaſſe ex hac Arena,
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quicquid a Magnete attrahitur.</
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<
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<
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">Non tamen id valde volatile eſt, aut cum leviſſimis Salis Ammo-
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niaci partibus adſcendit, licet ex hac Arena, ſimul cum illispartes
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quædam Aurantii coloris in auras adſcendant, uti ex ſequenti pro-
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ceſſu liquebit.</
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incluiæ phialæ committebantur Igni Arenæ trihorii ſpatio, quo </
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