Friday, November 17, 2006

Gerard DeBrahm Explains the Great Smokies

"Although these Mountains transpire through their Tops sulphurueaous and arsenical Sublimations, yet they are too light, as to precipitate so near their Sublimitories, but are carried away by the Winds to distant Regions. In a heavy Atmosphere, the nitrous Vapours are swallowed up through the Spiraculs of the Mountains, and thus the Country is cleared from their Corrosion,; when the Atmosphere is light, these nitrous Vapours rise up to the arsenical and sulphureous (subliming through the Expiraculs of the Mountains), and when they meet with each other in Contact, the Niter inflames, vulgurates and detonates, whence the frequent Thunders, in which a most votalized Spirit of Niter ascends to purify and inspire the upper Air, and a phlogiston Regeneratum (the metallic Seed) descends to impregnate the Bowels of the Earth; and as all these Mountains form so many warm Athanors which draw and absorb, especially in foggy Seasons, all corrosive Effluvia along with the heavy Air through the Registers (Spiracles) and thus cease not from that Perpetual Circulation of the Air, corroding Vapours are no sooner raised, than that they are immediately disposed of, consequently the Air in the Appalachian Mountains in extreamely pure and healthy." (ca. 1760)

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