. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. ?as Co. ^li. OrJzna-rtf l-ioTzi- 6cule, if :r Ohfec/ascliJ; Zrojrn a7' /oroc/zc^iof aicqt6e^(^j,J; it-tan- iferous Trva^T^e^z^B Cj'J:ps£ii^a7ny^(^u2e^ of cUorvieit) ancL. Ordi^CL-ri^ liffkt. Scale fii/xia-n-ieieri'. 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, 1847-188

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. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. ?as Co. ^li. OrJzna-rtf l-ioTzi- 6cule, if :r Ohfec/ascliJ; Zrojrn a7' /oroc/zc^iof aicqt6e^(^j,J; it-tan- iferous Trva^T^e^z^B Cj'J:ps£ii^a7ny^(^u2e^ of cUorvieit) ancL. Ordi^CL-ri^ liffkt. Scale fii/xia-n-ieieri'. 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