Index On Base 1926=100 Lowered To Level Of Later Index By Applying Ratio Of 12-Months' Total In 1913 On 1957-1959 Base To 12-Months' Total In 1913 On 1926 Base (523.7 Divided By 858.5 Equals 0.61002) To The Monthly Figures 1890-1912. Source: For 1890-1912, Bls Bulletin No. 543, Pp. 3-11; For 1913 And Following Years Through 1966, "Farm Products--Code 01: Wholesale Price Index (1957-1959=100);" Bls Unpublished Table, March, 1962; 1965 "Business Statistics" (Survey Of Current Business); Current Indexes In "Wholesale Prices And Price Indexes" (Monthly); Also Survey Of Current Business.
This NBER data series m04058 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04058
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Wholesale Prices of Farm Products for United States [M04058USM350NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04058USM350NNBR/, November 29, 2015.