Data Are The Sum Of Weekly Reporting Member Banks (Column 1) And Nonweekly Reporting Member Banks (Column 2). Data For 1919-April 29, 1921 Are For The Friday Nearest The End Of The Month; Data For June 1, 1921-1942 Are For The Wednesday Nearest The End Of Month. Source: Friedman And Schwartz, Monetary Statistics Of The United States (NBER, 1970), Table 25, Parts Iiia And Iiib, Pp. 385-393.
This NBER data series m14185 appears on the NBER website in Chapter 14 at http://www.nber.org/databases/macrohistory/contents/chapter14.html.
NBER Indicator: m14185
Release: NBER Macrohistory Database
National Bureau of Economic Research, Vault Cash, Member Banks, Federal Reserve System for United States [M14185USM144SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M14185USM144SNBR, May 1, 2016.