Schott, Gaspar
,
Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.
,
1657
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proportio preſſionis aquæ BA ad preſſionem aquæ BC au
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getur; ergo, &c. </
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>Dixi, donec exhauſtum ſit totum crus CB
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oppoſitum: nam illo exhauſto, minuitur ſemper magis ac magis
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celeritas effluxus per os A, quoniam minuitur perpendiculum
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aquæ, ac proinde ſemper minùs ac minùs premitur aqua apud A. </
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Annotatio.
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In ſiphone inverſo pluribus tubis quàm duobus compoſito eadem. </
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& ob eandem cauſam contingunt, vt patębit conſideranti.
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Propoſitio IV.
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Siphonis mixti inæqualium crurium proprie
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tates aſſignare.
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>SIphonum mixtorum crura vel ſunt omnia æqualia, vel omnia </
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inæqualia, vel aliqua æqualia, aliqua inæqualia. </
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>De proprie
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tatibus ſiphonis, cuius omnia crura ſunt æqualia, agemus Pro
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poſit. </
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>ſequenti; de reliquorum proprietatibus hîc agemus. </
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igitur ſiphon AKDI. </
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>Hic ſi integer maneat, habebit omnia cru
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ra inæqualia: ſi truncetur in E, aut in B, habebit aliqua crura
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æqualia, alia inæqualia: ſi truncetur in F, aut N, habebit iterum
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omnia crura inæqualia. </
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Siphonis mi
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xti variæ
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ſpecies.
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Prima Proprietas.
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>SI ſiphon AKDI maneat integer, & repleatur totus aquâ, efflu
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et ea tota per os I. Ratio eſt, quia perpendiculum DI lon
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gius eſt quàm perpendiculum DK, ut ſupponitur; ergo plùs
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premitur aqua apud I, quàm apud K, per dicta Propoſit. III.
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præcedente, Propriet. I. & Capite I. Propriet. III. ac proinde
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aqua DI trahit aquam DK; quâ tractâ, ſequitur etiam aqua
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KA, tum proprio pondere, tum ad vacuum impediendum. </
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Secunda Proprietas.
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<
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>SI crus DI truncetur in B, ita vtos B ſit eiusdem altitudinis
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ſupra horizontom cum ore A, & totus ſiphon AKDB replea
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tur aquá; eſt qui putat non effluere ex B, ſed effluere ex A, du
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rareque fluxum donec ſuperficies aquæ B pervenerit ad C,
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hoc eſt, donec effluxerit tantum aquæ, quantum eſtintra BDC, </
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