Casati, Paolo, De igne dissertationes physicae, 1686

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              <pb o="54" file="0482" n="482" rhead="Diſſertatio Secunda."/>
            manui impetum imprimi ſentimus, quoties ex ſclopo, quem
              <lb/>
            tenemus, exploditur ignis in nitrato pulvere accenſus.</s>
            <s xml:id="echoid-s15666" xml:space="preserve"/>
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            <s xml:id="echoid-s15667" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s15668" xml:space="preserve">Hoc ſanè probabilitate non prorſus caret: </s>
            <s xml:id="echoid-s15669" xml:space="preserve">nam ſicut
              <lb/>
            poteſt quis ceream candelam parare, cui inſeratur ex tenui pa-
              <lb/>
            pyro tubulus pyrio pulvere plenus, adeò ut, ubi candelæ pars
              <lb/>
            deflagraverit, ignis ad tubulum deveniens pulverem incendat;
              <lb/>
            </s>
            <s xml:id="echoid-s15670" xml:space="preserve">ita pariter contingere poteſt, ut conglomeratio illa ex ſatis pin-
              <lb/>
            gui vapore, & </s>
            <s xml:id="echoid-s15671" xml:space="preserve">igniculis non omninò æquabiliter commiſtis, pri-
              <lb/>
            mùm accendatur, & </s>
            <s xml:id="echoid-s15672" xml:space="preserve">luceat, deinde ardor deveniens ad ſinum
              <lb/>
            aliquem materiâ in flatum facillimè ſolubili plenum, ſubitam
              <lb/>
            raritatem inducat, qua flatus multo cum impetu ſe explicet, & </s>
            <s xml:id="echoid-s15673" xml:space="preserve">
              <lb/>
            navim in latus inclinet. </s>
            <s xml:id="echoid-s15674" xml:space="preserve">Sed non eſt in hoc diutiùs immorandum: </s>
            <s xml:id="echoid-s15675" xml:space="preserve">
              <lb/>
            quanquam non inutiliter in hujuſmodi cogitationes delapſi ſu-
              <lb/>
            mus, quippe quæ lucem aliquam præferunt ad explicandos alios
              <lb/>
            ignes, quos Meteorologici contemplantur: </s>
            <s xml:id="echoid-s15676" xml:space="preserve">illorum videlicet
              <lb/>
            materia, qua conſtant, minimum differre cenſenda eſt, nec alio
              <lb/>
            diſcrimine ſecernuntur, præterquam figurá, aut motu. </s>
            <s xml:id="echoid-s15677" xml:space="preserve">Si enim
              <lb/>
            in aëre accenſa fuerit exhalatio brevi ardore permanens, ſinè
              <lb/>
            certa figura, Flamma, ſeu Fax ſimpliciter appellatur: </s>
            <s xml:id="echoid-s15678" xml:space="preserve">ſin au-
              <lb/>
            tem ex ampliore baſi in acutum verticem aſſurgat pyramidis in
              <lb/>
            morem, Igni Perpendiculari nomen fecere. </s>
            <s xml:id="echoid-s15679" xml:space="preserve">Jam verò ſi accenſa
              <lb/>
            materia oblonga fuerit & </s>
            <s xml:id="echoid-s15680" xml:space="preserve">craſſior, aut jacenti ſimilis eſt, & </s>
            <s xml:id="echoid-s15681" xml:space="preserve">
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            Trabs vocatur, aut erecta & </s>
            <s xml:id="echoid-s15682" xml:space="preserve">tereti ſigurá, & </s>
            <s xml:id="echoid-s15683" xml:space="preserve">eſt Columna. </s>
            <s xml:id="echoid-s15684" xml:space="preserve">
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            Quòd ſi brevior ſit & </s>
            <s xml:id="echoid-s15685" xml:space="preserve">ſubtilior, aut Lancea, aut Sagitta dicitur,
              <lb/>
            prout veræ Lanceæ aut Sagittæ figuram imitatur. </s>
            <s xml:id="echoid-s15686" xml:space="preserve">Porrò accide-
              <lb/>
            re poteſt, ut illa pinguis vaporis & </s>
            <s xml:id="echoid-s15687" xml:space="preserve">igneorum halituum conglo-
              <lb/>
            batio extremitatem in tenues lacinias conciſam habeat, quaſi
              <lb/>
            caprinum vellus, aut ejus craſſiori parti adhæreat hinc longiuſ-
              <lb/>
            culum ſyrma quaſi cauda, hinc verò quaſi caput, & </s>
            <s xml:id="echoid-s15688" xml:space="preserve">ad latera ap-
              <lb/>
            pendices quaſi alas expanſas explicet, adeò ut illa Capræ, hæc
              <lb/>
            Draconis ſaltem rudem imaginem referat, & </s>
            <s xml:id="echoid-s15689" xml:space="preserve">ex hujuſmodi ſpe-
              <lb/>
            cie modò Capræ, modò Draconis nomen obtineat. </s>
            <s xml:id="echoid-s15690" xml:space="preserve">Quoniam
              <lb/>
            autem ſic conformatus vapor non hæret in eadem ſtatione, ſed
              <lb/>
            movetur, nunc Capra ſaltans, nunc Draco volans apparet. </s>
            <s xml:id="echoid-s15691" xml:space="preserve">
              <lb/>
            Saltus edere videbitur, ſi varijs in ſinubus contineatur materia
              <lb/>
            in ſubitum flatum ſolubilis, ubi eam ardor corripuerit; </s>
            <s xml:id="echoid-s15692" xml:space="preserve">qui dum
              <lb/>
            ſerpit (licèt univerſus vapor colluceat) illam per intervalla ac-
              <lb/>
            cendit, adeóque rarefacta erumpens totam molem ita commo-
              <lb/>
            vet, ut ſubſiliat. </s>
            <s xml:id="echoid-s15693" xml:space="preserve">Volatûs verò ſpeciem exhibebit, ſi obliquè
              <lb/>
            tranſverſo tramite feratur; </s>
            <s xml:id="echoid-s15694" xml:space="preserve">id quod ferè tribui poterit aut leni
              <lb/>
            vento in ſuperioribus flanti, à quo impellatur vapor, & </s>
            <s xml:id="echoid-s15695" xml:space="preserve">fuerit </s>
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