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1778. Containing the theory and natural history of Strata, Fissures, and Lodes, with the methods of Discovering and Working of Tin, Copper, and Lead Mines, and of Cleansing and Metalizing their Products; Shewing each particular process for Dressing, Assaying, and Smelting of Ores. To which is added, An Explanation of the Terms and Idioms of Miners. ... Lond: Printed and Sold for the Author, 1778. Folio. Hf.cf. with marbled boards. Spine gilt titled. (IV,X,XXII,XVI,332pp.). With engrv. portr., 7 engrv. plates 3 of which are fold., and 2 fold. tables. Some minor damp stains on margin of portrait; Some slight soiling, but overall a very good copy, complete with Subscribers List. 1st ed. Rare.