Release: NBER Macrohistory Database
Source: P.H. Douglas: For 1890-1926, "Real Wages In The United States, " P. 96; For 1927-1928, "The Movement Of Money And Real Earnings, " P. 32 (University Of Chicago, Studies In Business Administration, No. 3).
This NBER data series a08053 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: a08053
National Bureau of Economic Research, Average Hourly Money Earning in Metal Trades for United States [A08053USA052NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A08053USA052NNBR, August 29, 2016.