Series Is Presented Here As Two Variables--(1)-- Original Data, 1874-1904 (2)--Original Data, 1901-1941. Data Were Computed By NBER By Averaging All The Weekly Highs And Lows Falling Within A Month (And Not Including First Three Days Of The Succeeding Month, Which Is The Ordinary NBER Method). The Grades Of Sheep For Which Prices Were Quoted Are: Common To Choice, 1874-1875; Good To Choice, 1876-1884; Common To Choice, 1885; Inferior To Choice, 1886-1901; Good To Choice, 1902 And 1904; Inferior To Choice, 1903. Source: Annual Reports Of The Chicago Board Of Trade
This NBER data series m04009a appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04009a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Sheep Prices for Chicago, IL [M0409AUS16980M287NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0409AUS16980M287NNBR/, October 10, 2015.