Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Cents per Pound, Not Seasonally Adjusted

Frequency:  Monthly

Series Has Been Subdivided Into Two Variables: (1)-- Original Data, Lake Copper, 1860-1912; (2)-- Original Data, Electrolyte Copper, 1911-1955. Lake Copper Is From Native Copper Mines Of The Lake Superior District. The Standard Range Of Conductivity Is 99.5%. Electrolyte Copper Is Refined By The Electrolytic Process And Runs From 99.93% And Upwards For Cathodes. From 1932 On Copper Is Referred To As "Domestic" Rather Than New York. This Refers To Net Price At Refineries On The Atlantic Seaboard, Most Of Which Are Located In The New York Tidewater Area. For All Practical Purposes "New York" And "Atlantic Seaboard" Refineries Are Identical. Source: 1860-1893:"Mineral Industry", 1893, P.253, And Following Issues; 1894-1955:"Engineering And Mining Journal", January 4, 1896, P. 5, And Following Issues (Also Available In "Mineral Industry" A Supplementary Publication Of "E & M Journal")

This NBER data series m04015b appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.

NBER Indicator: m04015b