This Series Ends On The 1923-1925=100 Base, And The New Revised Series Starts In 1939 On A 1939 Base. Source: For 1919-1930, Bureau Of Labor Statistics, Bulletin 610, Pp. 102, 63-64; For 1931-1932, Bureau Of Labor Statistics, Mimeographed Release, September, 1938, "Revised Index Numbers Of Factory Employment And Payrolls"; For 1933-1939, Mimeographed Release, May, 1940; For 1940-1942, "Employment And Payrolls" And Monthly Labor Review.
This NBER data series m08123 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08123
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Factory Payrolls - Silk and Rayon Goods for United States [M08123USM331NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08123USM331NNBR/, July 7, 2015.