Borger Calls The Series"X". It Represents An Attempt At Complete Coverage, As Far As Concerns The Corporate Field Of Mining, Manufacturing, Construction, Public Utilities And Transportation (Except For Pipe Lines); And Partial Coverage Of Services (Laundries, Hotels, Restaurants, And Amusements, But Not Business Services). Source: Harold Borger, Outlay And Income In The United States: 1921-1938, (NBER, 1942), Pp. 297-299, Table 28.
This NBER data series q09048 appears on the NBER website in Chapter 9 at http://www.nber.org/databases/macrohistory/contents/chapter09.html.
NBER Indicator: q09048
Release: NBER Macrohistory Database
National Bureau of Economic Research, Net Profits of All Corporations for United States [Q09048USQ144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q09048USQ144NNBR/, September 1, 2015.