| |
| | PENNSYLVANIA - Online Information article about PENNSYLVANIA |
 | | Potter counties on the north middle border, it rises 2400-2500 ft. above the sea, but from this height the general upland level falls gradually to 1200-1300 ft. in the south-west and 900-loon ft. along the Ohio border, and in Erie county there is a sudden fall of about 200 ft. to the Erie plain. |
| | Besides having practically all the anthracite, Pennsylvania has the thickest bituminous coal-measures, and most of the coal obtained from these is of the best quality. |
| | It increased to 1,000,000 tons in 1850, to 11,760,000 tons in 1875, to 79,842,326 tons in 1900, to 150,143,177 tons in 1907; and was 117,179,527 tons in 1908, when it was 35.2 % of that of the entire country and was valued at $118,816,303. |
| encyclopedia.jrank.org /PAS_PER/PENNSYLVANIA.html (5130 words) |
|
