TABLE 98.-Coal produced in Kentucky, 1919–1923, in net tons

a

+2,643, 142

$113, 542, 000-$13, 495, 000

Martin, Owsley, Pulaski, and Wayne in 1919; Martin, Pulaski, and Wayne in 1920; Knott, Lawrence, and Wayne in 1921; Knott, Owsley, and Wayne in 1922; and Owsley and Wayne in 1923.

▸ Christian and Hancock in 1919; Christian and McLean in 1920; Christian and Crittenden in 1921; and Christian, Crittenden, and Hancock in 1922 and 1923.

No canvass of wagon mines for 1921.

MARYLAND

Although the output of coal in 1923 in Maryland was greater than in the two preceding years, it was less than in any other year since 1882. Much of the State's production is now derived from drawing pillars and stumps in the older workings, and costs of production are therefore comparatively high. Labor difficulties and a poor market played a large part in limiting the output in 1923. The strike of 1922, which began April 1 and was settled in other union districts by Labor Day, dragged on in Maryland far into 1923 and was not officially declared off until November. The mines were in operation 178 days. The increase from 1922 to 1923 was 1,063,219 tons, or 87 per cent; the value increased $2,789,000, or 67.7 per cent.

The average daily tonnage for the years 1918 to 1923 ran the scale from 15,000 tons in 1918 to 3,900 tons in 1922. In 1923 there was a gradual decline from a 9,000-ton average in January to 6,000 tons in December. (See fig. 58.)

TABLE 100.-Coal produced in Maryland, 1919–1923, in net tons

Coal production in Michigan in 1923 recovered promptly from the low mark caused by the strike of the preceding year, the gain being 242,685 tons, or 26.1 per cent, in quantity and $852,000, or 18.2 per cent, in value. The mines were in operation more days, though employing fewer men to take out the coal. The daily output per man was very nearly the same for the two years-2.65 tons in 1922 and 2.67 tons in 1923.