Schott, Gaspar
,
Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.
,
1657
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ſeat & aquæ effuſæ quantitas, & vaſis ſeu tubi evacuati ſpatium,
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& aquæ deſcendentis ac effluentis velocitas eo decremento,
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quod eſt inter numeros impares, verſus unitatem. </
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<
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>Explico. </
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<
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>Sit
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vas quodcunque aquâ plenum, eius fluxus dividere debeat di
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em, aut quam cunque diei partem, in quatuor æquales partes;
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ſintque in vaſe 16 v.g. menſuræ ſeu libræ aquæ, quæ dato
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tempore effluant. </
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<
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>Dico, primo tempore effluere ſeptem men
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ſuras, ſecundo quinque, tertiò tres, quarto & ultimo unam. </
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<
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>Dico iterum, ſi tota vaſis altitudo ab infima ad ſupremam
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aquæ ſuperficiem dividatur in 16 æquales partes, aquam in pri
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mo tempore deſcendere ad 7 ſpatia, in ſecundo ad
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in ter
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tio ad tria, in quarto ad unum. </
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<
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>Dico tandem, aquam in pri
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ma hora deſcendere
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effluere ut ſeptem, in ſecunda ut quin
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que, in tertia ut tria, in quarta ut unum. </
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<
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>Sequitur ex dictis
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ſuprà Propoſitione 8, 9, & 10, quas vide. </
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<
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>Eadem ratio in
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omnibus alijs eſt. </
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Corollarium.
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Vas parare,
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cuius flux
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9
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dividat da
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tum tempus
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in partes
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æquales.
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<
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>EX his patet, quomodo parandum ſit vas, cuius fluxus dato
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tempore durans dividat illud tempus in partes æquales. </
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<
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>Sit
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enim vas, cuius fluxus duret per ſpatium duodecim horarum, &
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hoc ſpatium temporis ſit dividendum, beneficio fluxus aquæ, in
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12 æquales partes ſeu horas. Duc 12. in ſeipſa, & produces 144.
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Deinde divide vaſis altitudinem à ſuprema ad infimam aquæ ſu
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perficiem, in 144 partes ſeu ſpatia æqualia, & inferiùs prope
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fundum vaſis incipiendo, deputa ultimæ horæ ex duodecim
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vnũ
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ſpatiolum, penultimæ tria, ante penultimæ quinque, & ſic ul
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teriùs progredere ſecun dùm ſeriem ſeu progreſſionem numero
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rum
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, prout apparet in numeris lateri dextro CD ſequen
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tis figuræ appoſitis. </
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<
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>His pręſtitis, diviſum erit vas in ſpatia inęqua
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lia, quę ſingulis æqualibus temporibus, nempe horis, evacuantur,
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videbiſque aquam in prima hora deſcendere à ſpatio ultimo ſeu
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144, uſque ad ſpatium 121; in ſecunda hora uſque ad ſpatium
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100; in tertia uſque ad 81; & ſic porrò uſque ad finem; prout </
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