Casati, Paolo, De igne dissertationes physicae, 1686

Table of handwritten notes

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              <pb o="192" file="0620" n="620" rhead="Diſſertatio Sexta."/>
            prodire neceſſe eſt, eâ fortaſſe ratione, quâ ex ipſis telluris
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            viſceribus plurimos halitûs ſollicitante interiori calore in,
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            aërem extrudi obſervant in altiſſimis cavernis aureæ venæ
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            ſcrutatores; </s>
            <s xml:id="echoid-s20154" xml:space="preserve">qui ex hujuſmodi expirationum copiâ, quibus
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            ferè præſocantur, proximam tempeſtatis mutationem præ-
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            ſagiunt. </s>
            <s xml:id="echoid-s20155" xml:space="preserve">Non eſſe autem Maculas niſi Solis expirationes,
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            ſuadet illarum tùm varietas, ità ut ejuſdem maculæ figura,
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            poſtridie, ferè nunquam omnino talis appareat, qualis pri-
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            die viſa fuit, tùm inconſtantia, ita ut aut eadem diſtraha-
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            tur in plures, aut ex pluribus una confletur; </s>
            <s xml:id="echoid-s20156" xml:space="preserve">id quod etiam
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            in nubibus ex terrenis halitibus quotidiano ferè experi-
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            mento obſervamus. </s>
            <s xml:id="echoid-s20157" xml:space="preserve">Immò ſicuti diſcuſſis nubibus Solis fer-
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            vorem terra excipit validiorem, quem priùs interiectæ nubes
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            retundebant; </s>
            <s xml:id="echoid-s20158" xml:space="preserve">ita quoquè cùm nullæ in Sole conſpiciuntur Ma-
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            culæ, fervida eſt tempeſtas; </s>
            <s xml:id="echoid-s20159" xml:space="preserve">quemadmodum accidit anno
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            1632. </s>
            <s xml:id="echoid-s20160" xml:space="preserve">a die 19. </s>
            <s xml:id="echoid-s20161" xml:space="preserve">Julii uſque ad 15. </s>
            <s xml:id="echoid-s20162" xml:space="preserve">Septembris, cum aura fuerit
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            tunc ſicciſſima; </s>
            <s xml:id="echoid-s20163" xml:space="preserve">quaſi deterſis nubibus Solaribus radii ex toto
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            diſco ad nos perveniant. </s>
            <s xml:id="echoid-s20164" xml:space="preserve">Nec probabilitate prorſus caret eo-
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            rum ſententia, qui ex hiſce Solaribus expirationibus, aliquan-
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            do ſaltem, Cometarum materiam ex parte deſumptam opi-
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            nantur, cum nulla penitus Macula in Sole fuerit obſervat@
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            anno 1618. </s>
            <s xml:id="echoid-s20165" xml:space="preserve">quo tres Cometæ arſerunt. </s>
            <s xml:id="echoid-s20166" xml:space="preserve">Eatenus autem ſolùm
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            ſimilitudinem à nubibus ductam volo, quatenus ex illâ ex-
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            plicatur concurſus & </s>
            <s xml:id="echoid-s20167" xml:space="preserve">diſiunctio expirationum: </s>
            <s xml:id="echoid-s20168" xml:space="preserve">neque enim
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            rem totam toti rei ſimilem exiſtimo, quaſi ſicuti nubes ſunt
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            à terra diſiunctæ, ita etiam maculæ eſſent à Sole avulſæ, & </s>
            <s xml:id="echoid-s20169" xml:space="preserve">
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            hoc tantummodo efficerent, ut lucis particulas nobis occul-
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            tarent, quâ ratione Mercurii ſidus, aut Luna, cùm Solem
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            ſubeunt. </s>
            <s xml:id="echoid-s20170" xml:space="preserve">Quapropter, ſi in re tàm procul à nobis non eſt
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            opinari neſas, dicerem expirationes ex intimis Solis partibus
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            ad extimam ſuperſiciem propulſas ita immiſceri lucidis parti-
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            culis, ut primùm earum motum aliquatenus retardantes,
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            dum reliquæ circumpoſitæ liberè moventur, & </s>
            <s xml:id="echoid-s20171" xml:space="preserve">fulgent, um-
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            bræ ſpeciem exhibeant; </s>
            <s xml:id="echoid-s20172" xml:space="preserve">deinde aliis atque aliis accedentibus
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            prorſus cohibeatur motus lucis proprius; </s>
            <s xml:id="echoid-s20173" xml:space="preserve">adeòque maculæ
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            præſertim circa medium, ubi Solis facies magis conferta eſt
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            expirationibus, nigrorem referant, tandiu autem durant,
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            donec vi caloris diſſipatæ & </s>
            <s xml:id="echoid-s20174" xml:space="preserve">excuſſę fuerint hujuſmodi expira-
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            tiones. </s>
            <s xml:id="echoid-s20175" xml:space="preserve">Ex quo fit agitatione illâ calidorum igniculorum va-
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            riam fieri maculæ figuram; </s>
            <s xml:id="echoid-s20176" xml:space="preserve">modò minui expirationibus ali-
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            quibus diſcuſſis; </s>
            <s xml:id="echoid-s20177" xml:space="preserve">modò amplificari novis advenientibus; </s>
            <s xml:id="echoid-s20178" xml:space="preserve"/>
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