Schott, Gaspar
,
Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.
,
1657
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Attractiva
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vis ex appet
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itu vacui
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vel replen
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di, vel fu
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giendi ori
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tur in Ma
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chinis hy
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dro-pnev
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maticis.
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Protheoria I.
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§. I.
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Hero Alexandrinus Vacuum in aëre & aqua
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diſseminatum agnoſcit.
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>HEro Alexandrinus, ſimul Spiritalium Magiſtrum agens, ſi
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mul Democritici,
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Epicureiq́ue
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Philoſophi perſonam, prio
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rem de Vacuo ſententiam doctè non minùs quàm fusè explicat,
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atque tuetur, in Præfatione Libelli ſui de Pnevmaticis ſeu Spi
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ritalibus, vbi ait
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: Alij enim vnivërsè nullum omnino vacuum eſſe
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affirmant; alij coacervatum quidem naturâ nullum eſſe vacuum, ſed
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ſecundùm exiguas partes diſſeminatum in aëre, humido, & igne, alijsque
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corporibus; quibus maximè aſſentiri convenit.
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>Vacuum coacerva
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tum veteres vocabant
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ν</
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, diſſeminatum verò
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μένον</
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, vt
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notat Petrus Gaſlendus in Philoſophia Epicuri; à quo Epicuro
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Hero ſontentiam ſuam mutuatus eſt. </
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, inquit Epicurus
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Epiſtola ad
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Herodotũ
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,
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vniverſum
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autem partim quidem Corpus, partim verò inane eſt.
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Hero vacu
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um admit
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tit in aëre
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& aqua diſ
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ſeminatum
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Epicuriu
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vacuum ad
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mittit.
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>Suam porrò de vacuo ſententiam Hero tot probat rationi
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bus & experientijs, vt demonſtratam exiſtimet, easque dignas
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cenſuit Marinus Merſennus, quas Hydraulicis ſuis præmitteret
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Phœnomenis. </
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Vaſa, quæ
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multis vacua videntur,
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eò quòd nullum in ijs viſibile deprehen
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dunt Corpus,
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non eſſe vacua, vt putant, ſed aëre plena.
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>Quod
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quidem patet ex eo, inquit Hero, quòd
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ſi vas, quod vacuum vide
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tur, quis inverſum in aquam depreſſerit, rectumque ſervarit, aqua in
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ipſum non ingredietur, quamvis totum occultatum fuerit.
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>Vtique
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non alia de Cauſa, niſi quia aër, cum Corpus ſit, & totum vas
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occupet, non permittit aquam ingredi, vt ipſemet ſubjungit. </
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Idem patetin phialis vitreis, ollis, alijsque vaſis, ſi inverſa aquis
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immergantur: non enim niſi difficulter admodum demergun
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tur; & dum retrahuntur, latera interiora habent ſicca; non ob
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aliud profectò, niſi quia incluſus aër ingreſſum prohibuit aquæ. </
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Vaſa ina
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nia aëre eſſe
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plena, vari
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is probatur
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experimen
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tis.
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<
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>Quòd ſi prædictorum Vaſorum inverſorum aquis immer
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ſorum
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fundum quis perforet, aqua quidem per os demerſum in ipſa in
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gredietur, aër verò per foramen exibit,
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adeo manifeſtè, vt non </
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