Commercially speaking

the anthracite division may be said. to consist of Pennsylvania alone, although. a small amount of anthracite coal is mined in Colorado. The original coal beds of New England have been metamorphosed into graphite and graphitic coal. This area is cenfined to Hastern Rhode Island, and the counties of Bristol and Plymouth, Ma . The product mined from the beds requires 2 considerable degree of heat for combustion, and can be used only with other combustible material or under an intense draft or blast. The entire annual output is but a few you sand tons, ‘The anthracite region of Pennsylvania as a whole, has a maximum length of about 115 miles, a maximum breadth of about 40 miles; area 2bout 1,700 square miles; but the area underlaid by workable coal beds is only about 470 square miles. The bituminous coal areas of the United States may for convenience be grouped into seven divisions: The