Casati, Paolo
,
De igne dissertationes physicae
,
1686
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De Calore.
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cap. </
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<
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<
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">habetur, *Qui ab arte ad opus adhibetur ignis, ipſius ope-*
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*ris pars non eſt; </
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<
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">at qui in naturâ habetur calor, diffuſus per ip-*
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*ſum opus eſt, atque vnâ cum cœteris ſubſtantiam eius explet: </
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<
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*nulla in hoc difficultas eſt. </
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<
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">proximè autem ſuperiùs dixerat. </
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<
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">Siue*
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*igitur ſeparatio ſit, ſiue attenuatio, ſiue aliud quodcunque ſint ca-*
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*lefactio & </
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<
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">ignitio, differentia certè ſortientur opera, pro modo*
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*tali calore vtentium. </
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<
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*nam illa, tanquam inſtrumento, calore vtitur; </
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<
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*mento, & </
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<
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">hoc addendum eſt (quandoquidem hìc nobis de
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Calore, quem Formalem ſeu Actualem vocanr, quo ſcilicct quid
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incaleſcere dicitur, ſermo eſt, non autem de ijs, quæ Virtua-
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liter Calida cenſentur, quia quadam calefaciendi virtute pollent,
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ſi proritentur, quamuis nullum tangenti calorem impertiri vi-
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deantur, (de quibus nobis erit aliàs opportuniùs diſſerendum) quod
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Caloris complicatam notionem euoluere non poſſumus, quin ìn-
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genitam ipſorum igniculorum, ſiue Spirituum commotionem in-
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telligamus. </
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">Quamobrem ſi Motum inter Accidentia referri ne-
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mo negat, Calori verò, quà Calor eſt, inſita eſt commotio & </
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agitatio, conſequens eſt, vt inter Accidentia Calor recenſeatur.
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</
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">Quemadmodum enim ferrea lorica ad Accidentium genus perti-
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nere nequit, niſi militis pectori admoueatur, quem loricatum con-
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ſtituat; </
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<
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">ita quoquè ſopiti igniculi, atque deſides Spiritus, à Quali-
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tatis & </
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antè dicitur, quàm agitari incipiant.</
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">Hæc Spirituum atque Igniculorum agitatio ſi nobis in-
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noteſceret (nec diffiteor) ſatis commodè atque probabiliter ca-
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loris proprietates explicaremus. </
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<
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">Verùm, quamuis flammam tre-
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mulam ſubuolare in cœlum videamus, & </
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">in ardentibus carboni-
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bus, excuſſo cinere, nictationem quandam, quaſi ignìculi hùc
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illùc diſcurrerent, obſeruemus, anceps tamen hæreo, vtrùm
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quid ſimile omnibus, quæ ſinè luce incaleſcunt, contingat, in
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quibus nullus eſt conſpicuus motus: </
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<
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">ſubuereor ſcilicet, ne
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fortè videar nimis craſſam philoſophandi rationem ſectari,
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ſi calorem gigni, nihil eſſe dixero, quàm ſpiritus agi-
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tari.</
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ſuetudine oculorum, ſi ratio ſuadeat ſeuocare intelligentiam </
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