Series Is Presented Here As Three Variables--(1)--Original Data, 1867-1886 (2)--Original Data, 1882-1924 (3)--Original Data, 1919-1940. For 1867-1886, Data Exclude Waste Raw Silk (Not Available Prior To July, 1882). Source: Monthly Summary Of Foreign Commerce
This NBER data series m07037a appears on the NBER website in Chapter 7 at http://www.nber.org/databases/macrohistory/contents/chapter07.html.
NBER Indicator: m07037a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Raw Silk Imports for United States [M0737AUSM589NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0737AUSM589NNBR/, August 28, 2015.