Original Data For 1913-1952 Was On A 1947-49=100 Base But Was Converted To A 1957-59=100 Base By A Conversion Factor Of .8605852. Source: 1913-1952: Bls Undated Mimeographed Table, "Consumer Price Index For Urban Wage Earners And Clerical Workers, U.S. City Average: Food Series B" (See Notes Below); 1953-1963: Bls Mimeographed Release, "Consumer Price Index -- Food At Home, 1953 Forward, Series B-1"; 1964-1968: Bls Monthly Publication, "The Consumer Price Index" (Or "Monthly Labor Review")
This NBER data series m04071 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04071
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Retail Prices of Food At Home for United States [M04071USM350NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04071USM350NNBR/, August 2, 2015.