Original Sources For Data Are: Geological Survey (1890- 1901), Iron Age (1902-1922), And Steel, The Magazine Of Metalworking And Metalproducing (1923-1957). Prices As Of First Of Month, 1890-1919, And Average Of Wednesday Prices Form 1920 On. A Strike Occurrred In 1902, From "Spring To Latter Part Of Year." Iron Age. Strike In 1922 Reached Height In July And Ended Gradually From October January, 1923. There Was A Labor Dispute In The Anthracite Coal Industry, 10/1925-02/1926. Source: Bls Bulletins And "Wholesale Prices" (Except For 1920-1922-- Revised Figures From Bls Direct) Through 1941; Bulletin Nos. 718, 736, 759, 785, 870, 877, 920, 943, 947, 1007, And 1083 Through 1951; For 1952 And Following, Survey Of Current Business, 1955 Statistical Supplement And Monthly Issues.
This NBER data series m04138 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04138
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Beehive Coke, Connellsville Furnace for United States [M04138USM296NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04138USM296NNBR/, July 7, 2015.