Series Is Presented Here As Two Variables--(1)--Original Data, 1919-1939 (2)--Original Data, 1948-1959. Data Are For Weighted Averages Of Prevailing Rates. Source: Federal Reserve Board, Annual Report For 1931, P. 82 And Successive Reports; Federal Reserve Bulletin, October 1939, P. 908.
This NBER data series m13004 appears on the NBER website in Chapter 13 at http://www.nber.org/databases/macrohistory/contents/chapter13.html.
NBER Indicator: m13004
Release: NBER Macrohistory Database
National Bureau of Economic Research, Rates On Customer Loans for New York, NY [M13004US35620M156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M13004US35620M156NNBR/, August 30, 2015.