Series Is Presented Here As Four Variables--(1)--Original Data, 1890-1915, (2)--Original Data, 1914-1922 (3)--Original Data, 1922-1941 (4)--Original Data, 1938-1958. These Figures Represent The Average Of The Iron Age Quotations On Basic Pig Iron At Valley Furnaces And Foundry Iron At Chicago, Birmingham, Buffalo, Valley, And Philadelphia. The 1958 Total Is Based On Data For January-March And The First Three Weeks Of April. Source: The Iron Age, January 5, 1956, P.296, And Monthly Averages Published In Weekly Issues.
This NBER data series m04010d appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04010d
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Pig Iron, Composite for United States [M0410DUSM288NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0410DUSM288NNBR/, July 2, 2015.