Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 1: Opera mechanica
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DESCRIPTIONES.
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miter alligati ſunt duobus cylindris minoribus, qui cum majo-
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ri cohærent, & </
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<
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<
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pendens, alter extenſus. </
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<
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xml:space
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">In fundo cylindri cum hoc conjun-
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gitur ope cochleæ interpoſito annulo coriaceo pyxis H; </
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<
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xml:space
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ut exacte claudat apperturam cylindri; </
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<
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xml:space
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">E E ſunt retinacula,
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quæ cylindrum in inferiori parte conjungunt cum theca,
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qua includitur, ſed quæ hic non eſt exhibita, ne turbetur
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figura: </
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<
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">E F eſt funis annexus embolo B, circumponitur
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trochlea G, & </
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<
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tur.</
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<
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</
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<
s
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xml:space
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">Obtecto parvâ aquæ quantitate embolo, qui ſuperius fir-
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miter debet conſiſtere, ne poſſit exire ex cylindro, immittitur
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in ciſtam H parum pulveris tormentarii cum parva quantitate
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igniarii Germanici accenſi, & </
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xml:space
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">clauditur bene ciſta mediante
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ſua cochleâ.</
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<
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</
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<
s
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xml:space
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">Pulvis ille paulo poſt accenſus implet cylindrum flammâ
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& </
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<
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">fugat aërem per tubos coriaceos C D, C D, qui exten-
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duntur, quique ſtatim clauduntur iterum ab aëre exteriore;
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</
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<
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xml:space
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">ita ut cylindrus maneat aëre vacuus, ſaltem maximâ parte; </
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porro embolus B eſt adactus per preſſionem aëris, qui ſupra
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gravitat ad deſcendendum, & </
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illud quod ei appenditur.</
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<
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</
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<
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xml:space
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">Quantitas ejus preſſionis cognita eſt, & </
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<
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">determinata, per
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gravitatem aëris, & </
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<
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">per magnitudinem diametri emboli, qui,
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ſi ſit unius pedis, ita premitur, ut ſuſtineat pondus 1800
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circiter librarum; </
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<
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">poſito, quod cylindrus totus fiat aëre va-
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cuus, quod huc uſque efficere non potui; </
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<
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menta eo reſpectu in magnis & </
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<
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modo proceſſere.</
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</
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<
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<
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">Cylindrus diametri 2{1/2} pollicum, & </
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">20 poll. </
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<
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dere 6 granorum pulveris aëre, evacuatus fuit {5/6} partibus;
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</
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<
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">in cylindro ejusdem latitudinis, ſed longitudinis 44 poll.</
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requiruntur 36 grana pulveris ut ejiciantur {4/6} aëris; </
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<
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xml:space
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cylindro diametri unius pedis, & </
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">3{1/2} altitudinis, 1{1/2} drachma
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pulveris ad fugandum {1/2} aëris; </
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<
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tate vix magis evacuatus fuit cylindrus.</
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