Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Diſſertatio Secunda.
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tare, validiùs adhuc urgente, arctiúſque premente exhalatio-
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ne, quæ in latera tunc primùm ſecedit; </
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<
s
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xml:space
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">ſed, hac poſtea latiùs
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digrediente ac langueſcente, illa ſe faciliùs explicat, & </
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<
s
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xml:space
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">terra,
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dilatatur, ut laterariâ exhalatione circumſcribente cunei for-
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mam induat. </
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<
s
xml:id
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echoid-s15920
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xml:space
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preserve
">Cum autem manifeſtum ſit exhalationem ex con-
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cepto impetu rectâ progredientem celeriùs moveri, quàm quæ
<
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obliquè flectitur ad latus, illa præ hac citiùs venit ad cunei ba-
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ſim (& </
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<
s
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xml:space
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">quidem breviore viâ) atque adeò materiam exagitans
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baſim amplificat, antequam eò perveniat exhalatio, quæ ad
<
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latus tendit: </
s
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<
s
xml:id
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echoid-s15922
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xml:space
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">propterea hæc occurrens baſi amplificatæ, ab inte-
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riori exhalatione etiam tùm commotâ ita inflectitur, ut ejus
<
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pars motum, turbinis in morem, concipiens liquentem ac mol-
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lem adhuc cunei materiam perfodiat, reliqua progrediatur in-
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ſtituto itinere: </
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<
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xml:space
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">atque idcircò foramen amplius eſt, quâ parte
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exhalatio perfodiens ſibi viam aperit & </
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<
s
xml:id
="
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xml:space
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">ingreditur, anguſtius
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verò, quâ parte egreditur. </
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<
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xml:space
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">Dixi autem liquentem ac mollem
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cunei materiam; </
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<
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xml:space
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">ſi enim in fornace ob nimium calorem, qui
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igni proximi collocati fuere crudi lateres, non rarò, dum co-
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quuntur, fluunt, ac ſolvuntur in quaſi ferream materiam;
<
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</
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<
s
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xml:space
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">quanto validior eſt fulminis calor, ut terram illo imbutam ſimi-
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liter emolliat?</
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<
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<
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">Grad. </
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">Omninò ex animi mei ſententiâ rem hanc definis;
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</
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<
s
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xml:space
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">nunquam enim acquieſcere potui aſſerentibus Cerauniam,
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Brontiam, Ombriam, & </
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<
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xml:space
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">ſi qui ſimiles ſunt lapides, è nubibus
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decidiſſe; </
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<
s
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xml:space
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">quemadmodum neque ranas in nube genitas quiſ-
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quam audet affirmare ex eo, quòd illas ſaltitantes videat in pul-
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vere, dum æſtate nimbi cadunt. </
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<
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xml:space
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">Sicut autem non ex omni pul-
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vere exurgunt ranæ, ita neque fulmen omnem terram, quam
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penetrat, obdurat, & </
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<
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">effingit in Cerauniam, ſed illam tan-
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tummodò, quam congruis particulis imbutam invenit.</
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<
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">Maur. </
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">Sed & </
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<
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xml:space
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">illud adde, quòd, ſicut non omnem æſtivam
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pluviam conſequuntur ranæ (ſi tamen tunc efformantur) ita
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non omne fulmen efficax eſt, ut terram excoquat, & </
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<
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">efformet in
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Cerauniam, etiamſi terra cæteroqui idonea eſſet. </
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<
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xml:space
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">Hoc mihi
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ſuadet tam varia fulminum naturâ, quæ licèt intrà exhalatio-
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nis genus conſiſtat, eſt tamen multiplicium exhalationum tam
<
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diverſa complexio, ut planè admirationem pariat earum effi-
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cientia. </
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<
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">Mira fulminis, ſi intueri velis, ait Seneca lib. </
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<
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<
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<
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<
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">, opera ſunt, nec quicquam dubii relinquentia, quin divina
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inſit illis, & </
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">Loculis integris, & </
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<
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">illæſis conflatur ar-
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gentum. </
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<
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<
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<
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