Series Is Presented Here As Two Variables--(1)--Original Data, 1915-1922 (2)--Original Data, 1919-1968. Source: Bureau Of Labor Statistics, Monthly Labor Review, December 1925, Pp. 3, 8, 12, 121.
This NBER data series m08069a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08069a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Factory Payrolls, Total for United States [M08K9AUSM330NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08K9AUSM330NNBR/, October 8, 2015.