Series Is Presented Here As Two Variables--(1)--Original Data, 1918-1928 (2)--Original Data, 1929-1944. Data Are Monthly Averages Of Daily Figures. Source: Data Are Computed By NBER From Federal Reserve Board Data.
This NBER data series m14086b appears on the NBER website in Chapter 14 at http://www.nber.org/databases/macrohistory/contents/chapter14.html.
NBER Indicator: m14086b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Percentage of Reserves Held To Reserves Required, All Member Banks, Federal Reserve System for United States [M1486BUSM156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M1486BUSM156NNBR/, December 1, 2015.