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

Table of Notes

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            vocari poteſt & </s>
            <s xml:id="echoid-s6222" xml:space="preserve">proxime determinabitur eo modo quo uſus eſt Joh. </s>
            <s xml:id="echoid-s6223" xml:space="preserve">Jacobus
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            Scheuchzer, obſervando quotidie altitudinem barometricam per longum
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            temporis tractum ſumendoque inter omnes mediam.</s>
            <s xml:id="echoid-s6224" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6225" xml:space="preserve">Atque hâc circumſpectione uſus celeberrimus Auctor ex multis obſerva-
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            tionibus, quæ ad ipſum ex pluribus transmiſſæ fuerunt locis, poſuit altitu-
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            dinem mediam.</s>
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          Patavii ------ # 27 poll. 11 {1/2} lin. Pariſ.
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          Pariſiis ------ # 27 poll. 9 {1/2} l.
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          Turini ------ # 27 poll. 1 {1/4} l.
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          Baſileæ ------ # 26 poll. 10 {1/8} l.
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          Tiguri ------ # 26 poll. 6 {1/2} l.
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          In monte Gothardi - # 21 poll. 27 {1/2} l.
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            <s xml:id="echoid-s6227" xml:space="preserve">§. </s>
            <s xml:id="echoid-s6228" xml:space="preserve">23. </s>
            <s xml:id="echoid-s6229" xml:space="preserve">Diverſitates iſtarum altitudinum mediarum ab inæqualibus loco-
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            rum ſupra mare elevationibus provenire notum eſt. </s>
            <s xml:id="echoid-s6230" xml:space="preserve">Jam enim Paſcalii tempo-
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            re experimenta ſumta fuere de deſcenſu mercurii in barometro ex loco profun-
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            diori in altiorem lato. </s>
            <s xml:id="echoid-s6231" xml:space="preserve">Inde Philoſophi in mutuam cauſæ & </s>
            <s xml:id="echoid-s6232" xml:space="preserve">effectus propor-
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            tionem inquirere: </s>
            <s xml:id="echoid-s6233" xml:space="preserve">Diverſæ in hanc rem variis auctoribus prodiere regulæ:
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            </s>
            <s xml:id="echoid-s6234" xml:space="preserve">Præcipua, cui etiamnum plurimi adhærent, hæc eſt, quod altitudines loco-
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            rum proportionem ſequantur logarithmorum, qui altitudinibus barometri re-
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            ſpondent. </s>
            <s xml:id="echoid-s6235" xml:space="preserve">Fundata eſt hæc regula præcipue ſuper eo, quod denſitas aëris ubi-
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            que proportionalis ſit ponderi aëris ſuperincumbentis: </s>
            <s xml:id="echoid-s6236" xml:space="preserve">male autem hic appli-
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            catur iſtud principium, quod pro aëre ejuſdem caloris tantum valet, neque
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            res certa eſt in omni altitudine aëris, quamvis in eadem columna verticali exi-
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            ſtentis; </s>
            <s xml:id="echoid-s6237" xml:space="preserve">ſi vero ita ſit, calorem æqualem eſſe, fatendum eſt, ſic ſatis recte regu-
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            lam ſe habere.</s>
            <s xml:id="echoid-s6238" xml:space="preserve"/>
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            <s xml:id="echoid-s6239" xml:space="preserve">At experimenta regulæ plane ſunt contraria; </s>
            <s xml:id="echoid-s6240" xml:space="preserve">igitur non eſt ubiquè idem
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            caloris gradus per totam columnæ aëreæ verticalis altitudinem, quod ut nunc
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            planum faciam, apponam experimenta quædam accurate, ut mihi perſuadeo,
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            inſtituta, ſed tamen, quod doleo, diverſis temporibus lociſque: </s>
            <s xml:id="echoid-s6241" xml:space="preserve">magis utique
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            inſtituto noſtro convenirent experimenta eodem tempore in eodemque mon-
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            te, diverſis tantum altitudinibus, ſumta; </s>
            <s xml:id="echoid-s6242" xml:space="preserve">talia autem, niſi pro mediocribus
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            locorum altitudinibus, nulla adhuc quantum ſcio extant cum omnibus quæ
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            ſcire oportet circumſtantiis.</s>
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