Series Is Presented Here As Three Variables--(1)--Original Data, 1923-1953 (2)--Seasonally Adjusted, 1919-1953 (3)--Original Data, 1947-1956. Source: Successive Issues Of The Federal Reserve Bulletin, Beginning With Those Of 1947.
This NBER data series m01260c appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01260c
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Production of Manufactured Food Products for United States [M0160CUSM349NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0160CUSM349NNBR/, July 4, 2015.