few small areas in the western part
of the anthracite field. The largest of these beds is the Bernice in
Sullivan County, Pennsylvania. Mr. William Kent, in his "Steam Boiler
Economy", describes this as follows: "The Bernice semi-anthracite coal
basin lies between Beech Creek on the north and Loyalsock Creek on the
south. It is six miles long, east and west, and hardly a third of a mile
across. An 8-foot vein of coal lies in a bed of 12 feet of coal and
slate. The coal of this bed is the dividing line between anthracite and
semi-anthracite, and is similar to the coal of the Lykens Valley
District. Mine analyses give a range as follows: moisture, 0.65 to 1.97;
volatile matter, 3.56 to 9.40; fixed carbon, 82.52 to 89.39; ash, 3.27
to 9.34; sulphur, 0.24 to 1.04."

Semi-bituminous coals are found on the eastern edge of the great
Appalachian Field. Starting with Tioga and Bradford Counties of northern
Pennsylvania, the bed runs southwest through Lycoming, Clearfield,
Centre, Huntingdon, Cambria, Somerset and Fulton Counties, Pennsylvania;
Allegheny County, Maryland; Buchannan, Dickinson, Lee, Russell, Scott,
Tazewell and Wise Counties, Virginia; Mercer, McDowell, Fayette, Raleigh
and Mineral Counties, West Virginia; and ending in northeastern
Tennessee, where a small amount of semi-bituminous is mined.

The largest of the bituminous fields is the Appalachian. Beginning near
the northern boundary of Pennsylvania, in the western portion of the
State, it extends southwestward through West Virginia, touching Maryland
and Virginia on their western borders, passing through southeastern
Ohio, eastern Kentucky and central Tennessee, and ending in western
Alabama, 900 miles from its northern extremity.

The next bituminous coal producing region to the west is the Northern
Field, in north central Michigan. Still further to the west, and second
in importance to the Appalachian Field, is the Eastern Interior Field.
This covers, with the exception of the upper northern portion, nearly
the entire State of Illinois, southwest Indiana and the western portion
of Kentucky.

The Western Field extends through central and southern Iowa, western
Missouri, southwestern Kansas, eastern Oklahoma and the west central
portion of Arkansas. The Southwestern Field is confined entirely to the
north central portion of Texas, in which State there are also two small
isolated fields along the Rio Grande River.

The remaining bituminous fields are scatt