output of coal
41Long Depression — Not to be confused with long term depression. The Long Depression was a worldwide economic crisis, felt most heavily in Europe and the United States, which had been experiencing strong economic growth fueled by the Second Industrial Revolution… …
42Nōgata, Fukuoka — Nōgata 直方市   City   …
43Guizhou — Coordinates: 26°50′N 106°50′E / 26.833°N 106.833°E / 26.833; 106.833 …
44Agecroft Colliery — was a coalmine in the Agecroft district of Pendlebury, what is now part of the City of Salford in Greater Manchester, England. First colliery (1844 1932) The colliery had two spells of usage, the first was between 1844 and 1932. The first pit was …
45Cwmparc — Coordinates: 51°39′12″N 3°31′09″W / 51.6532°N 3.5193°W / 51.6532; 3.5193 …
46History of technology — The history of technology is the history of the invention of tools and techniques. Background knowledge has enabled people to create new things, and conversely, many scientific endeavors have become possible through technologies which assist… …
47Datong — /dah tawng /, n. Pinyin. a city in N Shanxi province, in NE China. 300,000. Also, Tatung. * * * ▪ China Introduction Wade Giles romanization Ta t ung city, northern Shanxi (Shansi) sheng (province), northern China. The city is situated at the… …
48Military service — For military service in the meaning of an army as a military defense organization, see Armed forces. For state mandated military service, see Conscription. For the feudal institution, see Knight service. Military service, in its simplest sense,… …
49OHIO — (3,672), a State of the American Union, a third larger than Scotland, stretches northward from the Ohio River to Lake Erie, between Pennsylvania and Indiana. It consists of level and undulating plains, on which are raised enormous crops of… …
50Sales volume — (coal) The reported output from Federal and/or Indian lands, the basis of royalties. It is approximately equivalent to production, which includes coal sold, and coal added to stockpiles. U.S. Dept. of Energy, Energy Information Administration …
