Series Is Sum Of Data For A) Additions, B) Alterations And Repairs, C) Heaters, D) Fire Escapes, E) Elevators, F) Oil Burners, And G) Fireproofing. Source: 1890-95: "Annual Reports Of The Bureau Of Building Inspection, " Philadelphia; 1896-1935: Records Of Bur. Of Build. Insp.
This NBER data series a02060 appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02060
Release: NBER Macrohistory Database
National Bureau of Economic Research, Value of Permits For Additions and Alterations for Philadelphia, PA [A02060US37980A398NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A02060US37980A398NNBR/, July 31, 2015.