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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[661.] Regula prima.
Page: 682 (665)
[662.] Regula Secunda.
Page: 683 (666)
[663.] Regula Tertia.
Page: 683 (666)
[664.] TABULA
Page: 684 (667)
[665.] CAPUT DECIMUM. Tentamen de corporum Duritie.
Page: 685 (668)
[666.] EPHEMERIDES METEOROLOGICÆ ULTRAJECTINÆ ANNI MDCCXXVIII.
Page: 690 (673)
[667.] FINIS.
Page: 705 (685)
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481 - 510
511 - 540
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EPHEMERIDES METEOROLOGICÆ
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Aquæ immittitur incipienti in glaciem abire; </
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<
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intermedium diviſum eſt in 64 æquales partes: </
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<
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xml:space
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">Nix permixta cum
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Sale Ammoniaco, tempore hyberno atque ſummo regnante gelu
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circa bulbum copioſe circumpoſita liquorem condenſat, ût deſcen-
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dat ad notam 10, ita ut inter principium glaciei & </
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<
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artificiale intercedant notæ æquales prioribus 22. </
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<
s
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xml:space
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">â 10 ad 0 conti-
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nuatur Scala deorſum, ut frigus, forte artificiali adhuc majus,
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obſervari etiam poſſet; </
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<
s
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xml:space
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">ita quoque ſupra notam 96 ſcala aliquouſ-
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que ſurſum producitur, ut major calor indicaretur.</
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<
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<
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">Convenit hæc ſcala cum eâ Ingenioſiſſimi D°. </
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<
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">Fahrenheytii, cujus
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Mercurio impleta Thermoſcopia ita reſpondent, ut ad gradum 32
<
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ponatur indicium Aquæ mox in glaciem abituræ: </
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<
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xml:space
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">ad 96 calor ſangui-
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nis humani; </
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<
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xml:space
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">intermediique gradus ab utroque Thermoſcopio eidem
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calori expoſito indicantur: </
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<
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xml:space
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">Verum differt ſcala infra 32 gradum;
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</
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<
s
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xml:space
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">nam Thermoſcopia Mercurio impleta, deſcendunt ad gradum 0, im-
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miſſa nivi cum ſale Ammoniaco permixtæ, cum noſtrum tantum ad
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gradum 10 deſcendat.</
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<
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">Ex his certiſſimis terminis quilibet noſtras obſervationes cum iis,
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quæ ope aliorum Thermoſcopiorum peractæ ſunt, comparare fa-
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cile poterit: </
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<
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">fatendum tamen eſt Thermoſcopicas obſervationes
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raro capi ſolere ſatis cauté, eaſque plurimum differre prout huic
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alterive plagæ expoſita fuerint inſtrumenta; </
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<
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">ideo cum duobus in
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diverſis locis poſitis noſtras obſervationes condidimus.</
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<
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">Barometro uſus fui accurato, cujus mox dabo fabricam, etiamſi
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enim vulgatiſſima ſit machina, perraro rite conſtructa habetur,
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relicto utplurimum aëre in ſuperiori tubi parte, atque inter Mer-
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curii interſtitia; </
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<
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">ſolent enim argentum vivum tubo infundere, bul-
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lamque aëream per ipſum tranſmittere, aliquoties tubum inclinan-
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do, quo magna quidem pars Aëris intercepti hinc inde e Mercu-
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rio educitur, non tamen omnis: </
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ſticis imperitiſque ſufficiat: </
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">ſed ecquis â cachinno ſe temperet, eam
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a Philoſophis probatam deprehendens? </
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<
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">aſt ex hoc ungue Leonem.
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<
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">Accuratiſſima methodus, operoſa quidem verum Dii nil niſi laboribus
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vendunt, & </
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">Mercurius puriſſimus in ampla calefactus
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probe phiala includatur recipienti Boyleano, ex quo ſollicite edu-
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catur omnis aër, interim Mercurium agitando leniter; </
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