Casati, Paolo
,
De igne dissertationes physicae
,
1686
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Diſſertatio Tertia.
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attrectantes ſe ipſi docerent, quid de Solis calore tellurem per-
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uadente probabiliter opinandum ſit. </
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<
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xml:space
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">Equidem, fateor, in me-
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tallorum cauernas nunquam deſcendi, neque altius terram pene-
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traui quâm domeſtica hypogæa, cum aliquando ruſticarer: </
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<
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tum porrò abeſt, vt ſummâ æſtate aliquid caloris ibi perciperem,
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vt potiùs inde me citò proripere coactus fuerim, ne frigore nimio
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correptus valetudinis integritatem imminuerem. </
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<
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xml:space
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">Dabunt igitur
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mihi veniam Philoſophi illi, quod Solis calorem adhuc profun-
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diùs terram permeare non credam. </
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<
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">Quid verò in abditâ illâ terræ
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regione contingat, non aliunde certiùs diſcere poſſumus, quàm
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ex ijs, qui metallorum fodinas curioſiùs perueſtigârunt: </
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has enim nulla depreſſior cauerna innotuit; </
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">nemo quippe telluris
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viſcera tam altè ſcrutaretur, niſi operæ pretium quæreret. </
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<
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">Omnes
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autem, quoſcunque legerim de huiuſmodi fodinis diſſerentes, ſu-
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premæ telluris regioni frigus, inferiori teporem primùm, deinde
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calorem, qui ſenſim augeſcit, tribuunt: </
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">& </
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cas aurifodinas deſcribens Io: </
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">Baptiſta Morinus in Relatione de locis
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Subterraneis adiectâ ad eam, quam ſcripſit Mundi Sublunaris
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Anatomiam (pag.</
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<
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">narrat ſe deprehendiſse Menſe Iulio re-
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gionem ſuperiorem terræ frigidiſſimam vſque ad pedes 480 circi-
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ter; </
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">altiùs deſcendenti occurrìſſe calorem, qui vſque eò acrior in
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inferioribus ſpeluncæ partibus ſentiebatur, vt effodiendi laborem
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ſuſcipere non poſſent operarij niſi nudi: </
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<
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">id quod in omnibus Hun-
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gariæ fodinis obſeruari teſtatur. </
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">His omnino affinia ſunt, quæ
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ſcripſit Io: </
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inquit, *ſuperiori æſtate, in Hungariâ, medio milliari in Schem-*
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*nitz, in argenti fodinam mille quingentos circiter cubitos pro-*
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*fundam deſcendiſſem; </
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">à foſſoribus, qui ob ſummam mineræ æſtum*
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*veſtibus, & </
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">ipſo induſio exuti laborabant, didici; </
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">Vapores mi-*
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*nerales à centro Terræ frequenter ſurſum ferri, eorumque lu-*
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*cernas, & </
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*to autem tempore poſt, in eodem loco illos halitus ad parietes fo-*
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*dinæ in maſſam, quæ leui contactu inſtar olei fluat, coagulatos*
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*reperiri.</
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<
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">Quapropter nullus videtur relictus ambigendi locus, vtrùm à
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Sole, an ab Igne, quaſià Corde terræ, calor ille originem du-
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cat, qui per venas diffundatur, particulaſque commiſceat, ex
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quibus foſſilia coĕunt, ſiue ex metallorum aut mineralium, </
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