. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. '|i:>ie, tL_Ji iiiu'l basic. •X03r^ ,'^0 5'v5a;^w'L 3-lKil\"*\^ 3'^tiVv% ^"H-^&CS V^Q'O^ 37^^ >f ^j'Sl -So«ioi^5 S^.'iiis ^»^•^c 3j«s^o3. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Irving, Roland Duer, 1847-1888. Washington, Govt. Print. Off.

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectgeology, bookyear1883