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

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          <p>
            <s xml:id="echoid-s4622" xml:space="preserve">
              <pb o="62" file="00156" n="156" rhead="_DIALOGO_"/>
            due capi; </s>
            <s xml:id="echoid-s4623" xml:space="preserve">primieramente perche quanto più fonda può eſ-
              <lb/>
            ſer tanto più impura; </s>
            <s xml:id="echoid-s4624" xml:space="preserve">ſecondariamente può eſſer tanto
              <lb/>
            più conſtipata. </s>
            <s xml:id="echoid-s4625" xml:space="preserve">Tutti queſti capi poſſono molto vitiar l’o-
              <lb/>
            peratione. </s>
            <s xml:id="echoid-s4626" xml:space="preserve">e cauſare che quel bolide, ò ſcandaglio, che ſi
              <lb/>
            crederà affondarſi rettamente, anderà trauerſo; </s>
            <s xml:id="echoid-s4627" xml:space="preserve">perche
              <lb/>
            quell’acqua vguale al piombo, e corda con la ſua grauità
              <lb/>
            leuerà molto più di quello che eſſo ſuppone.</s>
            <s xml:id="echoid-s4628" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s4629" xml:space="preserve">_Ofr_. </s>
            <s xml:id="echoid-s4630" xml:space="preserve">Anch’io m’arricordo d’hauer vna volta viſto queſto ſuo
              <lb/>
            modo di ſcioglier detto problema, & </s>
            <s xml:id="echoid-s4631" xml:space="preserve">hauer notato non sò
              <lb/>
            che degno di eſſer auuertito da chi vorrà intendere queſta
              <lb/>
            ſua operatione. </s>
            <s xml:id="echoid-s4632" xml:space="preserve">Il peſo del piombo, che ritroua da aggiun-
              <lb/>
            ger alla fune è lib. </s>
            <s xml:id="echoid-s4633" xml:space="preserve">100. </s>
            <s xml:id="echoid-s4634" xml:space="preserve">qual peſo biſogna intenderlo in ac-
              <lb/>
            qua, e non in aria. </s>
            <s xml:id="echoid-s4635" xml:space="preserve">E perche ſuppone che lib. </s>
            <s xml:id="echoid-s4636" xml:space="preserve">2. </s>
            <s xml:id="echoid-s4637" xml:space="preserve">e mezza di
              <lb/>
            piombo in aria peſino in acqua lib. </s>
            <s xml:id="echoid-s4638" xml:space="preserve">2. </s>
            <s xml:id="echoid-s4639" xml:space="preserve">acciò che il piombo
              <lb/>
            peſi in acqua lib. </s>
            <s xml:id="echoid-s4640" xml:space="preserve">100. </s>
            <s xml:id="echoid-s4641" xml:space="preserve">biſogna che in aria ne peſi 125. </s>
            <s xml:id="echoid-s4642" xml:space="preserve">Che
              <lb/>
            poi biſogni intender che il piompo d’aggiunger alla fune
              <lb/>
            peſi lib. </s>
            <s xml:id="echoid-s4643" xml:space="preserve">100. </s>
            <s xml:id="echoid-s4644" xml:space="preserve">in acqua, e non in aria è manifeſto, perche tãt’
              <lb/>
            acqua quanto è la fune peſa lib. </s>
            <s xml:id="echoid-s4645" xml:space="preserve">400. </s>
            <s xml:id="echoid-s4646" xml:space="preserve">e la fune 300. </s>
            <s xml:id="echoid-s4647" xml:space="preserve">il piõbo
              <lb/>
            lib. </s>
            <s xml:id="echoid-s4648" xml:space="preserve">100 e l’acqua vguale ad eſſo lib. </s>
            <s xml:id="echoid-s4649" xml:space="preserve">20 Onde l’acqua vguale
              <lb/>
            a 100. </s>
            <s xml:id="echoid-s4650" xml:space="preserve">lib. </s>
            <s xml:id="echoid-s4651" xml:space="preserve">di piõbo in aria, e 1000. </s>
            <s xml:id="echoid-s4652" xml:space="preserve">piedi di fune peſerà lib. </s>
            <s xml:id="echoid-s4653" xml:space="preserve">420
              <lb/>
            è il predetto aggregato lib. </s>
            <s xml:id="echoid-s4654" xml:space="preserve">400. </s>
            <s xml:id="echoid-s4655" xml:space="preserve">Onde peſando più l’acqua
              <lb/>
            del corpo in eſſa collocato queſto galleggierà. </s>
            <s xml:id="echoid-s4656" xml:space="preserve">Biſogna
              <lb/>
            adunque che il piombo peſi in aria lib. </s>
            <s xml:id="echoid-s4657" xml:space="preserve">125. </s>
            <s xml:id="echoid-s4658" xml:space="preserve">perche così con
              <lb/>
            la fune peſerà lib. </s>
            <s xml:id="echoid-s4659" xml:space="preserve">425. </s>
            <s xml:id="echoid-s4660" xml:space="preserve">e l’acqua vguale a queſt’ aggregato
              <lb/>
            peſerà il m@demo.</s>
            <s xml:id="echoid-s4661" xml:space="preserve"/>
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          <p>
            <s xml:id="echoid-s4662" xml:space="preserve">_Cont_. </s>
            <s xml:id="echoid-s4663" xml:space="preserve">Vn’accidente, che occorre à queſto bolide, ſcandaglio,
              <lb/>
            ò altro corpo graue, che appeſo ad vna fune ſi laſcia diſcẽ-
              <lb/>
            dere nell’acqua, parmi che dia molto bene a vedere che l’-
              <lb/>
            acqua quanto più è profonda, tanto più iui grauiti; </s>
            <s xml:id="echoid-s4664" xml:space="preserve">accada
              <lb/>
            poi queſto per qual ſi ſia cauſa Se ſi laſcia diſcendere que-
              <lb/>
            ſto graue quanto ſi voglia, finalmente s’arriua in luogo,
              <lb/>
            che non più diſcende, ma la fune, & </s>
            <s xml:id="echoid-s4665" xml:space="preserve">il peſo ſtanno bene im-
              <lb/>
            merſi, ma però obliquamente; </s>
            <s xml:id="echoid-s4666" xml:space="preserve">e ſe ſi laſcia diſcender più
              <lb/>
            fune, più tutto queſto peſo s’obliqua. </s>
            <s xml:id="echoid-s4667" xml:space="preserve">Non ſi può dire
              <lb/>
            che queſto aggregato di fune, e di peſo attaccato ſia più
              <lb/>
            leggiero in ſpecie dell’acqua da per tutto, perche queſto æ-
              <lb/>
            ſcenderebbe à galla. </s>
            <s xml:id="echoid-s4668" xml:space="preserve">Fermandoſi adunque in vn luogo, bi-
              <lb/>
            gna dire che iui ſi pareggino li momenti dell’acqua, e </s>
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