Series Is Presented Here As Two Variables--(1)--Original Data, 1907-1927 (2)--Original Data, 1927-1942. Source: Data For 1927-1942: State Of New York, Department Of Public Service, Metropolitan Division, Transit Commission, Seventh Annual Report And Successive Reports.
This NBER data series m03010bb appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.
NBER Indicator: m03010bb
Release: NBER Macrohistory Database
National Bureau of Economic Research, Revenue Transit Rides, Subway, Street Railways, and Buses for New York, NY [M030BBUS35620M430NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M030BBUS35620M430NNBR, February 11, 2016.