Casati, Paolo
,
De igne dissertationes physicae
,
1686
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De Calore.
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contingat rarefactio, quam Philoſophicam vocant, non magno-
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pere noſtra iutereſt; </
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<
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">ſatis enim habemus, ſi irrumpentibus & </
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<
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echoid-s3876
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xml:space
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">agi-
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tatis igniculis incaleſcat humor, qui & </
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<
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xml:space
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">aliquando igni admotus
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feruet ebulliens, & </
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<
s
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echoid-s3878
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xml:space
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">in fumum abit adeò vrentem, vt non ſolùm con-
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cluſę vitreis vaſculis herbæ exudent liquorem, verùm etiam eodem
<
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illo fumo per tubi anguſtias erumpente redigi in calcem valeat Cor-
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nu Cerui.</
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<
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<
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xml:space
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">Grad. </
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<
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echoid-s3881
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xml:space
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">Non in ſolo igitur hypocauſti aëre igniculos agitatos ir-
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repere ſenſim in expoſiti laticis particulas dicendum videtur, ſed
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vt à ſubiectis aut circumpoſitis prunis in ahenum, fictilemue ollam
<
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penetrare igniculos, immiſceri liquori, partes omnes agita-
<
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re vehementiùs, bullas excitare, ex ijfque erumpere in
<
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fumum ſecum pariter rapiendo attenuatas liquoris parti-
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culas.</
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<
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<
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xml:space
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">Dand. </
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<
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">De hoc nullus mihi relinquitur dubitandi locus. </
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<
s
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echoid-s3885
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xml:space
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">Si enim
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Alabaſtri fruſtum in mortario contuſum, atque in tenuiſſimum
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puluerem (vulgus *Impalpabilem*, Chymiſtæ *Alchool* dicerent)
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redactum, & </
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<
s
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">pollinario cribro tranſmiſſum, vaſi ferreo aut cu-
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preo immittas, cui ignis ſubiectus ſit primùm quidem lentus,
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deinde gradatim auctus, ita puluiſculis immiſcentur igniculi, vt
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quid fiat ex illis quaſi fluidum, & </
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<
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xml:space
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">liquorem motu imitetur, ſi vas
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inclinetur in latus; </
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<
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xml:space
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">nihil tamen humoris ibi deprehenditur. </
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<
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xml:id
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echoid-s3889
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xml:space
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">Qua-
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propter igniculos per vaſis meatus irrepere vix negari à quoquam
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poteſt.</
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<
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</
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<
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">Grad. </
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">Id ſi ita eſt, per omnìa permeent & </
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<
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">tranſeant igniculi,
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neceſſe eſt, per æs, per lapidem, per vitrum, quod tamen minimè
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poros admittere conſtans eſt plurimorum opinio.</
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<
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">Maur. </
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xml:space
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">Quod quidem ad vitrum ſpectat (ex quo vtpote perſpi-
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cuo facilis eſt de cœteris coniectura) maiores omni exceptione te-
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ſtes qui ſe vidiſſe aſſerunt, producere poſſem: </
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>
<
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xml:space
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">ſed leui ſumptu,
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nec multo labore vobis ipſis experimentum capere licebit. </
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<
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xml:space
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">Vi-
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tream phialam (quæ tamen nulli adiecto pedi in@itatur) aquâ ex
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puteo aut ex fonte hauſtâ replete, eamque candentibus carboni-
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bus imponite: </
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<
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xml:space
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">vbi illa ſatis incaluerit, tum follium flatu cineres
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ex prunis decutite, ipſaſque aſſiduo flatu vrgete: </
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<
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xml:space
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">demum flam-
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mulas per aquam aſcendentes conſpicietis, quæ vobis vberiorem
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philoſop handi materiam ſuppeditabunt. </
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<
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xml:space
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">Quod ſi fortè ſuſpice-
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mini, an flammulæ aſcendentes ſint, an verò rutilantium </
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