Source: Simon Kuznets, "Capital In The American Economy: Its Formation And Financing, " (Princeton University Press For NBER, 1961)
This NBER data series a02214 appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02214
Release: NBER Macrohistory Database
National Bureau of Economic Research, Net Public Construction, Excluding Military (Constant Dollars) for United States [A02214USA379NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A02214USA379NNBR/, July 30, 2015.