Washington, [D.C.]: Printed for the House of Reps. [ Representatives ] 1850. -2, -224 pages + twelve lithographed plates numbered I through XII by Ackerman NY, eight of which are tinted. 8vo. Extracted from a bound volume, now with temporary paper wrappers. Includes the often missing transmittal letter to the Secretary of the Interior. First leaf proud of the balance of the textblock. Occasional foxing, including several of the plates. Good. Disbound. 
A government report from the 31st Congress, 1st session. House of Reps. Ex. doc. ; no. 69; Part I; Copper Lands. There was a Part II ("The iron region, together with the general geology") published in 1851 which included a number of maps.