A VIEW OF THREE COLLIERIES IN THE ANTHRACITE COAL BASIN NEAR MAHANOY CITY, PA.
Formerly much of the coal was shipped by canals, but the latter were not able to compete with the railways, and most of the coal-canals have been abandoned. The price of anthracite at tide-water (New York) varies from $3.20 to $4.50 per long ton. At Philadelphia the price is about one-fourth less. Buffalo is the chief lake-port for anthracite. Steam sizes are about two-thirds the price of house fuel.
COAL FIELDS IN UNITED STATES
Bituminous, or soft coal furnishes the larger part of the house fuel in the United States, and nearly all the house coal used in other parts of the world. It contains from fifteen to more than forty per cent. of volatile matter, burning with a long and smoky flame. The coal which contains twenty per cent. or less of volatile matter is a free-burning coal that may develop heat enough to partly fuse the ash, forming "clinkers"; it is therefore called "caking" coal, and is not only well adapted for use as fuel and steam-making, but it is also a good smelting coal.
Coal which contains more than thirty per cent. of volatile matter is known as "fat" coal and is generally used in the manufacture of coke and illuminating gas. Western Pennsylvania produces the largest amount of fat coal, but it is found here and there in nearly all soft-coal regions. A so-called smokeless bituminous coal occurs in various localities; its low percentage of volatile matter makes it an excellent house fuel.
Bituminous coal is mined in twenty-five States of the Union, Pennsylvania, Illinois, West Virginia, and Ohio heading the list. In about half the mines the coal is cut from the seam by means of machinery and is known as machine-mined coal. A very large part of the product is consumed within a short distance of the mines, and this is especially true of the region about the upper Ohio River.