Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Long Tons, Not Seasonally Adjusted

Frequency:  Annual

Notes:

Series Is Presented Here As Three Variables--(1)--Original Data, 1889-1915 (2)--Original Data, 1911-1937 (3)--Original Data, 1930-1939. Data Include Beneficiated Ore; Exclude Ore For Paint (Which Is Included In Production Figures) And Manganiferrous Ore Containing Over Five Percent Manganese. Source: Lake Superior Iron Ore, 1938, Pp. 308, 340; U.S. Bureau Of Mines, Minerals Yearbook, 1935-1938.

This NBER data series a01194b appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: a01194b