. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. Fi'ffs. s n-ni^. cnasi of laJre Superior near 2>u?tci7)., JffirtTi Ft'^. S ordinary li'yA^. â Ti.'y. ^ Iz^Tii Scale, so ' -^inorihticlJ^; ctzalZaytc Qzi.^tte(±j; tzianiferouj mcLyrteiiit (S)j iron. oxi'6lt/(^.>. 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,

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. The copper-bearing rocks of lake Superior / by Roland Duer Irving. Geology; Geology; Copper ores; Copper ores. Fi'ffs. s n-ni^. cnasi of laJre Superior near 2>u?tci7)., JffirtTi Ft'^. S ordinary li'yA^. â Ti.'y. ^ Iz^Tii Scale, so ' -^inorihticlJ^; ctzalZaytc Qzi.^tte(±j; tzianiferouj mcLyrteiiit (S)j iron. oxi'6lt/(^.>. 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