Series Is Presented Here As Two Variables--(1)--Original Data, 1839-1913 (2)--Original Data, 1919-1931. Data For Calendar Year. Source: Annuaire Statistique De La Fance, 1922.
This NBER data series a01172a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01172a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Total Horse Power of Steam Engines for France [A0172AFRA567NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A0172AFRA567NNBR/, October 13, 2015.