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TABLE 138.-Bituminous coal produced in Pennsylvania, 1919–1923, in net tons
Bradford includes Lycoming in 1919; Fulton and Lycoming in 1920; and Fulton, Lycoming, and McKean in 1921.
No production in Cameron in 1919; none in Cameron or McKean in 1920; none in Cameron in 1921; includes Fulton and Lycoming in 1922 and in 1923.
• Small mines include Fulton and McKean in 1919; no production in Cameron. No canvass of wagon mines for 1921.
More lignite was taken from the South Dakota mines in 1923 than in 1922, 10,379 tons, against 7,752 tons, an increase of nearly 40 per cent. The value was $25,000, compared with $22,000, a gain of 13.7 per cent. There were two more men employed, but the men worked 16 days less than in 1922.
The State of South Dakota operates a lignite mine, and the State Coal Mining Commission issues a detailed report on it. The mine is in Adams County, N. Dak., and of course the statistics of output are included in those of the latter State.
TABLE 139.-Lignite produced in South Dakota, 1922–23
TABLE 140.-Lignite produced in South Dakota, 1919–1923, in net tons
More coal was mined in Tennessee in 1923 than in the preceding year, as in most of the other States, but no new record was made. The output was 6,040,268 tons, valued at $16,515,000, an increase of nearly 24 per cent in quantity and about 17 per cent in value.
The number of men employed decreased, but the days in operation increased, and the average daily output per man rose from 2.59 tons in 1922 to 2.93 tons in 1923.
The time lost at the mines during the year was due to dearth of railroad cars and an uninterested market; labor troubles amounted to very little.
The course of daily production in 1923, shown in Figure 58, was remarkably steady.
FIGURE 58.-Production of coal per working day in Virginia, Tennessee, and Maryland, 1918-1923. Data from Table 78