Schott, Gaspar, Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet. , 1657

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              tempus quo effluit aqua per foramen 1, nempe 14400 minuta,
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              per 144; hoc eſt, ſi accipiatur centeſima quadrageſima quarta
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              pars minutorum 14400, nempe minuta 100; habebitur tem­
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              pus quo exhauritur vas CFDH, per digitale lumen E. </s>
              <s>Tan­
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              dem quoniam per Propoſit. XV. præcedentem, tempora qui­
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              bus deplentur vaſa ABCD, CFDH. æqualium baſium, ſed non
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              æqualium altitudinum, per idem foramen E, ſunt in ſubdu­
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              plicata ratione altitudinum, nempe pedum 4, & pedum 16;
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              ſi inter 4 & 16 inveniatur medius numerus proportionalis, nem­
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              pe 8; erit tempus quo evacuatur vas CFDH, per lumen digita­
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              le E, nimirum 100 minutorum, ad tempus quo evacuatur vas
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              ABCD per idem lumen digitale E, ut 4 ad 8, ſeu ut 1 ad 2,
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              nempe ut minuta 100, ad minuta 200, quæ efficiunt horas 3.
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              min. 20. </s>
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              Annotatio.
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              QVod diximus de vaſe priſmatico, debet etiam intelligi de cylindrico,
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              & cuiuscunque alterius figuræ; ſed tunc aſſumi debet tubus quadru­
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              pedalis vaſi ſimilis.
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              Propoſitio XXI. Problema V.
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              Dato vaſe, & tempore, invenire foramen per quod
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              evacuetur tempore dato.
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              <s>SIt data ciſterna A, 1600.
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              dum cubicorum; & tempus
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              B, quo evacuandum eſt totum,
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              ſit horarum 40 & minutorum
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              16; ſitque inveniendum foramen, per quod evacuetur ciſter­
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              na A data, in tempore B dato. </s>
              <s>Aſſumatur quodvis lumen ſeu
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              foramen notæ magnitudinis, v.g. lineare; & per Propoſitionem
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              XX. præcedentem inveniatur tempus C, quo ciſterna A hu­
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              mido plena, evacuetur tota per lumen lineare. </s>
              <s>Quoniam igi­
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              tur, per Propoſit. XVI. præcedentem, tempora quibus evacuan­
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              tur vaſa non ſemper plena, ſimilia, & æqualia quoad altitudinem </s>
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