Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Quomodo Ignis accendatur.
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cauſa, curſæpè ſarmenta in faſcem colligata ſolui iubemus atque
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laxari, vt citiùs vberior flamma exiliat, niſi vt erumpentium
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ex vno ligno igniculorum agitationi amplius ſpatium pateat
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quò validiùs commoti irrumpant in proxima ligna.</
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<
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">Cum itaque illa facilè ignem concipiant, quæ patenti-
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bus poris excipiunt immiſſos igniculos, atque celeriùs conflagrent,
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ſi diſſoluti Spiritus vnâ cum Sulphure in omne corpus liberè perma-
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nare poſſint; </
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<
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xml:space
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">ex contrario ægrè ignem admittere dicenda erunt
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illa, quorum obſtructi ſunt pori, quamuis cœteroqui non ſint
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ad exardeſcendum difficilia. </
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<
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">Sic materiam viſco illitam non arde-
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re affirmat Theophraſtus: </
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">& </
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<
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<
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">de ouorum gal-
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linæ præſtantiâ loquens ait, *Vis verò tanta eſt, vt lignum per fu-*
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*ſum ouo non ardeat, ac ne veſtis quidem contacta aduratur:</
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<
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xml:space
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">* in ob-
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ſtructos ſcilicet viſco, aut oui albumine, poros non facilè ſe inſi-
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nuatignis. </
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<
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">Sic pariter æqualibus partibus Aluminis & </
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læ cum aceto permiſtis ſiquid imbutum fuerit, non comburi di-
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citur. </
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<
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">Huc fortaſſe ſpectat medicamentum (eonomine, vt docet
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Caius Iureconſultus de Verborum ſigniſicatione, omne contine-
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tur, quod adhibitum naturam eius, cui adhibitum eſt, mutat)
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quod mihi neſcio quis aliquando præſcripſit, ne literæ poſſint com-
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buri. </
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<
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">Accipe, aiebat, acetum acerrimum, & </
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</
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<
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">in quibus dilue, & </
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">coagita hydrargyrum; </
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">eaque miſcellaneâ pa-
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pyrum terinunge, ac toties reſicca: </
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<
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">poſtea ibi ſcribe, quicquid
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viſum fuerit, & </
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">in ignem proijce: </
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ſtione reſilire. </
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<
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">Dubitanter tamen ſoli meatuum obſtru-
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ctioni hoc tribuerem, ſed reſilientis chartæ motus, quo exarſionem
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declinat, adſcribendus potiùs videtur particulis Mercurij, & </
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ab aceto relictis in papyri poris.</
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<
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<
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">Haud temerè ſuſpicaris petendam eſſe cauſam à particu-
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larum poros obſtruentium naturâ nam ſi oleo imbuta fuiſſet char-
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ta, vtique pori fuiſſent oleo pleni, nec quicquam impedimenti
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attuliſſet conflagrationi; </
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<
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">hydrargyrum verò neque albumen oui
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ea ſunt, quæ igneſcere poſſint: </
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<
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">ſed neque acetum, quod, vtpote
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acerrimum, ſalem valdè exaltatum continet, atque Spiritus ita à
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Sale comprehenſos, vt quaſi fixam naturam induerint: </
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<
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rea ſicut in deſtillatione aceti, vt omnibus acidis contingit, pri-
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mùm Phlegma, deinde Spiritus elicitur, ita quando charta ace-
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to illo delibuta leni aëris calore reſiccata eſt, in vaporem abijt </
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