Galilei, Galileo
,
Discourse concerning the natation of bodies
,
1663
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greate heate, or exalting of the voyce, either are not underſtood,
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or elſe being tranſported by oſtentation of not yeilding to one
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ther, farr from the firſt Propoſition, with the novelty, of the
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various Propoſals, confound both themſelves and their Auditors.</
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>Moreover, it ſeemed to me convenient to informe your
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neſſe of all the ſequell, concerning the Controverſie of which I
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treat, as it hath been advertiſed often already by others: and becauſe
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the Doctrine which I follow, in the diſcuſſion of the point in hand,
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is different from that of
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Ariſtotle
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; and interferes with his Principles,
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I have conſidered that againſt the Authority of that moſt famous
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Man, which amongſt many makes all ſuſpected that comes not from
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the Schooles of the Peripateticks, its farr better to give ones Reaſons
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by the Pen than by word of mouth and therfore I reſolved to write the
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preſent diſcourſe: in which yet I hope to demonſtrate that it was not
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out of capritiouſneſſe, or for that I had not read or underſtood
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Ariſtotle,
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that I ſometimes ſwerve from his opinion, but becauſe
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ſeverall Reaſons perſwade me to it, and the ſame
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Ariſtotle
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hath </
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tought me to fix my judgment on that which is grounded upon
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Reaſon, and not on the bare Authority of the Maſter; and it is
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moſt certaine according to the ſentence of
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Alcinoos,
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that
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ting ſhould be free. </
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>Nor is the reſolution of our Queſtion in my
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judgment without ſome benefit to the Univerſall, foraſmuch as
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treating whether the figure of Solids operates, or not, in their going,
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or not going to the bottome in Water, in occurrences of building
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Bridges or other Fabricks on the Water, which happen commonly
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in affairs of grand import, it may be of great availe to know the
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truth.</
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Ariſtotle
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prefers
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Reaſon to the
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Authority ofan
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Author.</
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The benefit of
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this Argument.</
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>I ſay therfore, that being the laſt Summer in company with certain
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Learned men, it was ſaid in the argumentation; That Condenſation
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was the propriety of Cold, and there was alledged for inſtance, the
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example of Ice: now I at that time ſaid, that, in my judgment,
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the Ice ſhould be rather Water rarified than condenſed, and my
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reaſon was, becauſe Condenſation begets diminution of Maſs, and
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augmentation of gravity, and Rarifaction cauſeth greater Lightneſs,
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and augmentarion of Maſſe: and Water in freezing, encreaſeth in
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Maſſe, and the Ice made thereby is lighter than the Water on which
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it ſwimmeth.</
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Condenſation
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the Propriety of
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Cold, according
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to the
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ticks.</
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Ice rather water
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rarified, than
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condenſed, and
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why:</
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What I ſay, is manifeſt, becauſe, the medium ſubtracting from the
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whole Gravity of Sollids the weight of ſuch another Maſſe of the ſaid
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Medium; was
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Archimedes
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proves in his ^{*} Firſt Booke
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De Inſidentibus
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Humido;
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when ever the Maſſe of the ſaid Solid encreaſeth by Diſtraction,
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the more ſhall the
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Medium
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detract from its entire Gravity; and leſſe,
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when by Compreſſion it ſhall be condenſed and reduced to a leſſe Maſſe.
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