Source: Simon Kuznets, National Product Since 1869 (NBER), 1946, Table I-16, P. 53
This NBER data series a10052 appears on the NBER website in Chapter 10 at http://www.nber.org/databases/macrohistory/contents/chapter10.html.
NBER Indicator: a10052
Release: NBER Macrohistory Database
National Bureau of Economic Research, Capital Consumption In Constant Prices for United States [A10052USA027NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A10052USA027NNBR/, August 1, 2015.