...the Sharp and Broad Mountains, no less than 65 seams have been counted. The bituminous coal field, embracing the western part of Pennsylvania, and a part of Ohio, extends over an area of 24000 square miles : the largest accumulation of carbonaceous matter probably in the world. In fact...

...middle of the valley, between the Sharp and Broad mountains no less than 65 seams have been counted. The bituminous coal-field, embracing the western part...Pennsylvania, and a part of Ohio, extends over an area of twenty-four thousand square miles ; the largest accumulation of carbonaceous matter probably in the...

...the Sharp and Broad mountains, no less than 65 scams have been counted. "The bituminous ooal field, embracing the western part of Pennsylvania, and a...: the largest accumulation of carbonaceous matter probably in the world. In fact the bituminous coal measures can probably be traced; almost continuously,...

...primary rocks and metamorphic ridges, bituminous at a distance from them. " The bituminous coal field, embracing the western part of Pennsylvania and a part...carbonaceous matter in the world. In fact, the bituminous coal measures can probably be traced almost continuously from Pennsylvania to the Mississippi, and...

...middle of the valley, between the Sharp and Broad mountains no less than 65 seams have been counted. The bituminous coal-field, embracing the western part...Pennsylvania, and a part of Ohio, extends over an area of twenty-four thousand square miles ; the largest accumulation of carbonaceous matter probably in the...