The First Time These Statistics Were Published Was In December Of 1881. Previous Data Are December 1880: 60,610 And; And June 1881: 59,936. The Data Represent Stocks Of Standard Copper In England, Le Havre, Rotterdam, Hamburg And Bremen, Plus An Amount Not Specified Which May Be Stocks Afloat. Rotterdam, Hamburg And Bremen Stocks Are Taken As Of July 31, 1914 (Rotterdam = 1.150; Hamburg = 2.867; Bremen = 1.106). Source: The Economist, Supplement Of April 14, 1883, P. 11 Dun'S Metal Handbook And Statistics
This NBER data series m05022 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05022
Release: NBER Macrohistory Database
National Bureau of Economic Research, Copper Stocks, Europe and Afloat, End of The Month for United Kingdom [M05022GBM525NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M05022GBM525NNBR/, September 5, 2015.