Angeli, Stefano degli, Della gravita' dell' aria e fluidi : esercitata principalmente nelli loro homogenei

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          <p>
            <s xml:id="echoid-s4071" xml:space="preserve">
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            peſerà lib. </s>
            <s xml:id="echoid-s4072" xml:space="preserve">21. </s>
            <s xml:id="echoid-s4073" xml:space="preserve">Crede V. </s>
            <s xml:id="echoid-s4074" xml:space="preserve">S. </s>
            <s xml:id="echoid-s4075" xml:space="preserve">che deſcenderà con la medema
              <lb/>
            velocità dell’oro?</s>
            <s xml:id="echoid-s4076" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4077" xml:space="preserve">_Ofr_. </s>
            <s xml:id="echoid-s4078" xml:space="preserve">Nò Signore. </s>
            <s xml:id="echoid-s4079" xml:space="preserve">Diſcenderà con aſsai minor velocità. </s>
            <s xml:id="echoid-s4080" xml:space="preserve">Per-
              <lb/>
            che ſe bene tutti doi li ecceſſi ſono aſsolutamente de lib.
              <lb/>
            </s>
            <s xml:id="echoid-s4081" xml:space="preserve">19. </s>
            <s xml:id="echoid-s4082" xml:space="preserve">nulladimeno paragonati con il mezzo, che s’alza, ſono
              <lb/>
            molto diuerſi; </s>
            <s xml:id="echoid-s4083" xml:space="preserve">mentre il primo ad eſso hauea la propor-
              <lb/>
            tione de 19. </s>
            <s xml:id="echoid-s4084" xml:space="preserve">ad 1. </s>
            <s xml:id="echoid-s4085" xml:space="preserve">& </s>
            <s xml:id="echoid-s4086" xml:space="preserve">il ſecondo de 19. </s>
            <s xml:id="echoid-s4087" xml:space="preserve">a 21; </s>
            <s xml:id="echoid-s4088" xml:space="preserve">quella tanto mag
              <lb/>
            giore. </s>
            <s xml:id="echoid-s4089" xml:space="preserve">e queſta minore.</s>
            <s xml:id="echoid-s4090" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4091" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s4092" xml:space="preserve">E ſe all’oro haueſſimo aggiunte lib. </s>
            <s xml:id="echoid-s4093" xml:space="preserve">20. </s>
            <s xml:id="echoid-s4094" xml:space="preserve">di materia più
              <lb/>
            leggiera in ſpecie del mezzo?</s>
            <s xml:id="echoid-s4095" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4096" xml:space="preserve">_Ofr_. </s>
            <s xml:id="echoid-s4097" xml:space="preserve">Diſcenderebbe queſto compoſto tanto più lentamente;
              <lb/>
            </s>
            <s xml:id="echoid-s4098" xml:space="preserve">e potria eſsere che foſse tanto più leggiero in ſpecie del
              <lb/>
            ſolo oro, che queſto aggregato foſse, ò della medema gra-
              <lb/>
            uità ſpecifica dell’acqua, ò di minore. </s>
            <s xml:id="echoid-s4099" xml:space="preserve">Nelli quali caſi
              <lb/>
            queſt’aggregato, nel primo non diſcenderebbe, enelſe-
              <lb/>
            condo galleggierebbe.</s>
            <s xml:id="echoid-s4100" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4101" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s4102" xml:space="preserve">V. </s>
            <s xml:id="echoid-s4103" xml:space="preserve">S. </s>
            <s xml:id="echoid-s4104" xml:space="preserve">ha riſpoſto mirabilmente. </s>
            <s xml:id="echoid-s4105" xml:space="preserve">Hora nel noſtro caſo, già
              <lb/>
            che ſupponiamo che il vetro ABC, & </s>
            <s xml:id="echoid-s4106" xml:space="preserve">aria cõſtipata DBE,
              <lb/>
            ſiano più graui in ſpecie dell’acqua, determiniamo l’ecceſ-
              <lb/>
            ſo della loro grauità;</s>
            <s xml:id="echoid-s4107" xml:space="preserve">e ſupponiamo per eſempio che ſia vn
              <lb/>
            quinto, dimodo che peſando vetro, & </s>
            <s xml:id="echoid-s4108" xml:space="preserve">aria condenſata
              <lb/>
            lib. </s>
            <s xml:id="echoid-s4109" xml:space="preserve">5. </s>
            <s xml:id="echoid-s4110" xml:space="preserve">l’acqua ad eſſi vguale ne peſi 4. </s>
            <s xml:id="echoid-s4111" xml:space="preserve">E manifeſto che di-
              <lb/>
            ſcenderanno conla velocità corriſpõdente ad vna libbra.</s>
            <s xml:id="echoid-s4112" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4113" xml:space="preserve">_Ofr_. </s>
            <s xml:id="echoid-s4114" xml:space="preserve">Certiſſimo.</s>
            <s xml:id="echoid-s4115" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4116" xml:space="preserve">_Mat_. </s>
            <s xml:id="echoid-s4117" xml:space="preserve">Intendiamo che al vetro, & </s>
            <s xml:id="echoid-s4118" xml:space="preserve">aria ſia aggiunta l’acqua
              <lb/>
            ADEC, che pur peſi lib. </s>
            <s xml:id="echoid-s4119" xml:space="preserve">5. </s>
            <s xml:id="echoid-s4120" xml:space="preserve">sì che tutto queſto compoſto
              <lb/>
            debba diſcendere, & </s>
            <s xml:id="echoid-s4121" xml:space="preserve">alzare vna mole d’acqua vguale à tut-
              <lb/>
            tala mole ABC; </s>
            <s xml:id="echoid-s4122" xml:space="preserve">è manifeſto che quello, che diſcenderà
              <lb/>
            peſerà lib. </s>
            <s xml:id="echoid-s4123" xml:space="preserve">10. </s>
            <s xml:id="echoid-s4124" xml:space="preserve">el’acqua, che s’alzerà lib. </s>
            <s xml:id="echoid-s4125" xml:space="preserve">9. </s>
            <s xml:id="echoid-s4126" xml:space="preserve">Onde la grauità
              <lb/>
            del corpo diſcendente eccederà l’acqua alzata pure d’vna
              <lb/>
            libbra, ma che ſarà vn decimo. </s>
            <s xml:id="echoid-s4127" xml:space="preserve">E perche li corpi più gra-
              <lb/>
            ui del mezzo diſcendono in eſſo con la velocità corriſpon-
              <lb/>
            dente all’ecceſſo della lor grauità ſopra quella del mezzo;
              <lb/>
            </s>
            <s xml:id="echoid-s4128" xml:space="preserve">& </s>
            <s xml:id="echoid-s4129" xml:space="preserve">il compoſto del vetro, & </s>
            <s xml:id="echoid-s4130" xml:space="preserve">aria eccedeua il mezzo d’vn
              <lb/>
            quinto; </s>
            <s xml:id="echoid-s4131" xml:space="preserve">& </s>
            <s xml:id="echoid-s4132" xml:space="preserve">il compoſto di vetro, aria, & </s>
            <s xml:id="echoid-s4133" xml:space="preserve">acqua @ccede d’vn
              <lb/>
            decimo, ſi moueranno, e diſcenderanno conforme à que-
              <lb/>
            ſti ecceſſi. </s>
            <s xml:id="echoid-s4134" xml:space="preserve">Ma quel quinto ſe bene aſſolutamente è vna lib-
              <lb/>
            bra, come è anco il decimo, nulladimeno </s>
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