Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1947-1956. This Segment Is Not Comparable To The Previous One Since The Bls Includes The Manufacture Of Fertilizers Into The Chemical Industry While The Nicb Treats Them As A Separate Industry Group, And Also Because Of The Inclusion Of New Industries Such As Plastics, Synthetic Rubber And Fibers, Etc. Source: Bureau Of Labor Statistics: For 1947-1952, "Employment, Hours, And Earnings, " Manufacturing Division, Nondurable Goods Subdivision, Chemicals And Allied Products, Releases Ls53-2660 Of February 1953 And May 1955; For 1953-1956, June 1956 Release, The Monthly Labor Review And "Employment And Earnings."
This NBER data series m08214b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08214b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Average Actual Hours of Work Per Week, Chemicals and Allied Products Manufacturing for United States [M0814BUSM065NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0814BUSM065NNBR/, September 3, 2015.