Schott, Gaspar
,
Mechanica hydraulico-pneumatica. Pars I. Mechanicae Hydraulico-pnevmaticae Theoriam continet.
,
1657
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nota, & ab Æolopilæ capacitate detrahatur; notam relinquet
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aëris quantitatem & nunc addenſati, & antea rarefacti. </
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>Hæc ex Merſenni ſententia; quæ tamen valde incerta mi
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hi videntur, tum quia non ſcitur quando Æolopila eſt ſummè
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calefacta, tum quia aqua abſumitur à calore Æolopilæ ante &
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poſt attractionem, tum denique quia conſtare non poteſt, utrum
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aër reſiduus poſt aquæ attractionem ſit ad naturalem ſtatum re
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dactus, an verò præter naturam addenſatus, aut rarefactus. </
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<
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de quæ dicimus infrà in Appendice. </
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Concluſio
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Protheoriæ Quartæ.
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>DIci hîc nonnulla poſſent de ſalientium ex fontibus pneuma
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ticis, quos deſcribimus Parte 2. Claſſe 1. cap. 2. Machina 8.
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longitudine, altitudineque, & cum tuborum ſalientibus compa
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rari, ut facit Merſennus in ſuis Hydraulicis Propoſit. 28. ſed
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quoniam valde incerta ſunt & quæ Merſennus affert, & quæ à
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me, & à quocunque alio, varijs experientijs inventa, afferri poſ
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ſunt; ſatiùs judicavi, omnino abſtinere. </
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<
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>Dependet enim ſalien
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tium hujuſmodi longitudo atque altitudo, non à tuborumlongi
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tudine, ſed potiſſimùm ab aëris intra fontem compreſſi vehe
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mentia, quæ infinitis modis variari poteſt; & cùm omnia exper
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tus fueris, dubius adhuc hærebis. </
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<
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>Dici præterea multa poſſent de fluxu aquæ per tubos incli
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natos & horizontales; examinarique, quæ habet Joannes Bapti
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ſta Balianus lib 4. & 5. de Motu gravium, ſeu lib. 1. & 2. de motu
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liquidorum: at quoniam hæc non admodum conducunt fini no
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ſtro in hoc Opere intento, & longiorem ſermonem requirunt;
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omittenda potiùs omnino quàm paucis perſtringenda pu
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tavi, acturus de illis in Mechanica Univerſali. </
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<
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praxin igitur, miſsâ theoriâ,
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procedamus.
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