Bernoulli, Daniel, Hydrodynamica, sive De viribus et motibus fluidorum commentarii

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            <s xml:id="echoid-s5910" xml:space="preserve">
              <pb o="204" file="0218" n="218" rhead="HYDRODYNAMICÆ"/>
            caloris: </s>
            <s xml:id="echoid-s5911" xml:space="preserve">maximæ igitur caloris variationes in aëre hic locorum continentur
              <lb/>
            intra terminos 3 & </s>
            <s xml:id="echoid-s5912" xml:space="preserve">4, quos in Anglia non ultra terminos 7 & </s>
            <s xml:id="echoid-s5913" xml:space="preserve">8 excurrere legi.
              <lb/>
            </s>
            <s xml:id="echoid-s5914" xml:space="preserve">Calor autem aëris, cujus elaſticitas tres quartas exæquet partes elaſticitatis aë-
              <lb/>
            ris inſtar aquæ bullientis calidi, corpori animali fere intolerabilem eſſe puto.</s>
            <s xml:id="echoid-s5915" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5916" xml:space="preserve">§. </s>
            <s xml:id="echoid-s5917" xml:space="preserve">8. </s>
            <s xml:id="echoid-s5918" xml:space="preserve">Ex cognita ratione inter diverſas ejusdem aëris eodemque ſpatio
              <lb/>
            incluſi elaſticitates, facile eſt deducere menſuram caloris, qui ad aërem perti-
              <lb/>
            neat, ſi modo conveniamus in definiendo calore duplo, triplo &</s>
            <s xml:id="echoid-s5919" xml:space="preserve">c. </s>
            <s xml:id="echoid-s5920" xml:space="preserve">quæ defi-
              <lb/>
            nitio arbitraria eſt, neque in rerum natura poſita; </s>
            <s xml:id="echoid-s5921" xml:space="preserve">mihi quidem videtur non
              <lb/>
            incongrue aëris calorem ſi communis ſit denſitatis proportionalem ſtatui ejus
              <lb/>
            elaſticitati. </s>
            <s xml:id="echoid-s5922" xml:space="preserve">Primus autem caloris gradus, à quo reliqui menſuram accipiant,
              <lb/>
            ſumetur ab aqua pluviali bulliente, quia huic procul dubio ubique terrarum
              <lb/>
            idem proxime caloris gradus eſt.</s>
            <s xml:id="echoid-s5923" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5924" xml:space="preserve">His ita acceptis erunt calores aquæ bullientis, aëris tempore æſtivo cali-
              <lb/>
            diſſimi & </s>
            <s xml:id="echoid-s5925" xml:space="preserve">aëris tempore hyemali frigidiſſimi in hiſce terris proxime ut 6, 4 & </s>
            <s xml:id="echoid-s5926" xml:space="preserve">3.
              <lb/>
            </s>
            <s xml:id="echoid-s5927" xml:space="preserve">Dicam nunc quemadmodum hoſce invenerim numeros, ut de accuratione ex-
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            perimentorum, quorum ſucceſſus ab Amontonianis diverſus admodum eſt, ju-
              <lb/>
            dicium ferri poſſit.</s>
            <s xml:id="echoid-s5928" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s5929" xml:space="preserve">§. </s>
            <s xml:id="echoid-s5930" xml:space="preserve">9. </s>
            <s xml:id="echoid-s5931" xml:space="preserve">Barometro nempe uſus ſum ordinario A C B E, (Fig. </s>
            <s xml:id="echoid-s5932" xml:space="preserve">57.) </s>
            <s xml:id="echoid-s5933" xml:space="preserve">id-
              <lb/>
              <note position="left" xlink:label="note-0218-01" xlink:href="note-0218-01a" xml:space="preserve">Fig. 57.</note>
            que hermetice ſigillari curavi in m; </s>
            <s xml:id="echoid-s5934" xml:space="preserve">hoc modo inſtrumentum mutavi in ther-
              <lb/>
            mometrum aëreum mutationibus barometricis non obnoxium: </s>
            <s xml:id="echoid-s5935" xml:space="preserve">Creſcente
              <lb/>
            enim calore intenditur elaterium aëris A m F altiorque fit columna mercurii
              <lb/>
            B D, quam aër captus ſuſtinet & </s>
            <s xml:id="echoid-s5936" xml:space="preserve">ſi ſpatium A m F veluti infinitum cen-
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            ſeri poſſet, eſſet calor in ratione altitudinis B D (per §. </s>
            <s xml:id="echoid-s5937" xml:space="preserve">§. </s>
            <s xml:id="echoid-s5938" xml:space="preserve">7. </s>
            <s xml:id="echoid-s5939" xml:space="preserve">& </s>
            <s xml:id="echoid-s5940" xml:space="preserve">8.) </s>
            <s xml:id="echoid-s5941" xml:space="preserve">atque
              <lb/>
            hujus thermometri ope poterit menſura caloris ubique ſpecifice definiri. </s>
            <s xml:id="echoid-s5942" xml:space="preserve">Si
              <lb/>
            enim immergatur inſtrumentum aquæ bullienti pluviali in ſitu verticali obſer-
              <lb/>
            veturque punctum G ad quod ſuperficies mercurii aſcendit; </s>
            <s xml:id="echoid-s5943" xml:space="preserve">fueritque dein-
              <lb/>
            de alius caloris gradus qualiscunque definiendus, qui mercurium ſuſtinuiſſe
              <lb/>
            ad punctum D usque obſervatus fuerit, erit utique calor iſte ad calorem
              <lb/>
            aquæ ferventis ut B D ad B G. </s>
            <s xml:id="echoid-s5944" xml:space="preserve">Et cum ratio B D ad B G conſtans ſit, quæ-
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            c
              <unsure/>
            unque fuerit altitudo B G, erit idem caloris gradus, de quo ſermo eſt,
              <lb/>
            ubique locorum facile imitabilis. </s>
            <s xml:id="echoid-s5945" xml:space="preserve">Poterit autem B G in centum aut mille
              <lb/>
            dividi particulas atque hujusmodi particulis altitudo B D definiri.</s>
            <s xml:id="echoid-s5946" xml:space="preserve"/>
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