Data Cover Only Lake Superior Iron Ore, But Beginning In April 1937, Eastern Plants Are Included Which Use Only A Small Proportion Of Lake Ore. Besides U.S. Lake-Front Furnaces Receiving Ore By Rail And Lake-Shore Furnaces In Canada Are Covered, Coverage Of Canadian Furnaces Beginning In June 1922. This Variable Ends In March 1956, Due To Increased Coverage Of Plants Which Makes Further Figures Not Comparable. The Figure For March 1928 Was Revised From 18.7 To 18.9 In Order To Correct An Error In The Survey Of Current Business. The Revised Figure Plus The Revised March Figure Of Series 05106 Add Up To The Total As Published In Scb And Source: Data For 1918-1943: Lake Superior Iron Ore Association; Data For 1944-1956: Survey Of Current Business, Statistical Supplements For 1947-1955 And Following Monthly Issues Lake Superior Iron Ores: 1938, Published By The Lake Superior Iron Ore Association, Cleveland.
This NBER data series m05015 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05015
Release: NBER Macrohistory Database
National Bureau of Economic Research, Iron Ore Stocks At Furnaces for United States [M05015USM418NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M05015USM418NNBR/, September 4, 2015.