Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

Table of figures

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              omnes vacui omninò remaneant; nonne ſequitur ne­
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              ceſſariò ampliatio molis totius cumuli; non quidem
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              à dilatatione facta ab ipſis
                <expan abbr="arũdinibus">arundinibus</expan>
              , ſed ex eo quod
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              grana frumenti expulſa ſpatium ſibi æquale intra tri­
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              ticum occupare debent, & ſic tota maſſa conſtans ex
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              ijſdem granulis frumenti corporeis, & ex ſpatijs va­
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              cuis in arundinibus relictis, procùl dubio maius ſpa­
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              tium occupare deberet, quàm priùs, & proindè am­
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              pliaretur moles totius aggregati, & rarefieri videre­
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              tur. </s>
              <s id="s.002982">Non ſecùs in aqua pura fluida ſpiræ, vel tubuli
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              aerei, qui priùs à particulis aquæ replebantur ſi po­
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              ſtea ab aliqua neceſſitate exinanirentur, expulſa ni­
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              mirùm aqua, quæ ibidem coercebatur, profectò per­
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              cipimus molem totius aquæ ampliari augerique de­
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              bere, propterea quod inſurgerent denuo tot ſpatio­
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              la vacua quot ſunt ſpiræ, vel tubuli aerei, & hæc vnà
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              cum ſolidis particulis aquæ amplius ſpatium re­
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              quirerent, & ideò moles aquea aucta, & rarefactą
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              videretur. </s>
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              Cap. 13 cau­
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              ſa rarefacti­
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              onis glaciei
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              affertur.</s>
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            <p type="main">
              <s id="s.002984">Eò igitur difficultas redacta eſt, vt oſtendamus in
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              actu congelationis aquæ huiuſmodi operationem̨
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              fieri poſſe, & indagemus modum, neceſſitatem, &
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              vim motiuam huius operationis. </s>
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              <s id="s.002985">Et primò duplici modo inſinuari mihi poſſe viden­
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              tur aquæ particulæ intra cauitates ſpirarum, ſiuè tu­
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              bulorum aeris, aut à violentia externa, aut
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              ſua;
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              vtroque modo fieri poſſe non videtur improbabile;
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              certum enim eſt ignis particulas, ſeù exhalationes
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              perpetuo diſcurrere, fluere que per omnia corporą </s>
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