. First century of national existence; the United States as they were and NNS 1 American THE GREAT OPEN QUARKY OF THE LEHIGH. In working this great quarry of anthracite at tlie Summit niiiic, aljore Mauch Chunk, Mocks of coal.\ere occasionally left stantiing for a time, one of which, surmonuteil by the soil of the original surface andhe relics of the vegetation, is represented in the aliove cut. In this block arc discerned the lines of strali-ication of the coal; and an idea of its extraordinary thickness and extent is conveyed by the appearance ofhe cliffs upon the further
. First century of national existence; the United States as they were and NNS 1 American THE GREAT OPEN QUARKY OF THE LEHIGH. In working this great quarry of anthracite at tlie Summit niiiic, aljore Mauch Chunk, Mocks of coal.\ere occasionally left stantiing for a time, one of which, surmonuteil by the soil of the original surface andhe relics of the vegetation, is represented in the aliove cut. In this block arc discerned the lines of strali-ication of the coal; and an idea of its extraordinary thickness and extent is conveyed by the appearance ofhe cliffs upon the further side of tlie excavated area. Upon the floor of the quarry are seen the miningivagona used for conveying away upon temporary tracks the coal and rulibish of the excavations. 129 ■whole area of this field has been computedat 57,000 square miles ; but its limits havenever been accurately defined. A fourthcoal-field occupies the central portion ofthe southern peninsula of Michigan, its areabeing about 13,350 square miles. Severalsmall beds of bituminous coal are worked inthis district, but they have only
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Keywords: ., bookauthorhodgejam, bookcentury1800, bookdecade1870, bookyear1874
