Calculated Capacity of Bituminous Coal Mines for United States (A0165AUSA448NNBR)

Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Millions of Short Tons, Not Seasonally Adjusted

Frequency:  Annual

Series Is Presented Here As Two Variables--(1)--Original Data, 1890-1944 (2)--Original Data, 1890-1961. Data Are For The Calculated 308-Day Capacity Of All Mines That Operate For Any Part Of The Yeaar, Including New Mines. Data Found In Source On Basis Of 280 Work Days A Year. Estimates Have Nothing To Do With Known Reserves, But Simply Represent Potential Production For An Arbitrarily Chosen Number Of Days Per Year. This Series Is Reprinted In Mineral Yearbook, 1945, P.834 On The Basis O Of 280 Working Days, And 261 Working Days (5-Day Work Week) A Year. Source: Data For 1890-1931: U.S. Bureau Of Mines, Mineral Resources, 1930, Pt. Ii, P. 621; 1931, Pt. Ii, P. 425. Data For 1932-1944: Statistical Appendix To The Mineral Yearbook, 1932-1933, P. 374; 1935, P. 632; 1939, P. 771; 1945, P. 853.

This NBER data series a01165a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: a01165a