Original Figures For 1923 And 1924 Were Adjusted By NBER To Exclude Amortization And Depletion To Conform With Rest Of Data. Source: U.S. Bureau Of Internal Revenue, "Statistics Of Income, 1923-1942"
This NBER data series a10060 appears on the NBER website in Chapter 10 at http://www.nber.org/databases/macrohistory/contents/chapter10.html.
NBER Indicator: a10060
Release: NBER Macrohistory Database
National Bureau of Economic Research, Depreciation Charges of Corporations With Net Income for United States [A10060USA027NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A10060USA027NNBR/, July 5, 2015.