The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General Literature, 6. köideThomas Spencer Baynes C. Scribner's Sons, 1878 |
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Page 47
... seam - a fact that was first pointed out by the late Sir W. E. Logan in South Wales . In Yorkshire the same thing is observed in the siliceous rock called ganister occurring in similar positions , show- ing that the coal plants grew ...
... seam - a fact that was first pointed out by the late Sir W. E. Logan in South Wales . In Yorkshire the same thing is observed in the siliceous rock called ganister occurring in similar positions , show- ing that the coal plants grew ...
Page 48
... GREAT SOUTH VEIN 4000 ft below Sea Level RENARD EDWARD ENCYCLOPÆDIA BRITANNICA , NINTH EDITION ETOUR GRAND VEIN NORTH VEIN 2000 ft below Sea S 233 20 The thickness of coal seams varies in this country The VOL . VI PLATE I COAL.
... GREAT SOUTH VEIN 4000 ft below Sea Level RENARD EDWARD ENCYCLOPÆDIA BRITANNICA , NINTH EDITION ETOUR GRAND VEIN NORTH VEIN 2000 ft below Sea S 233 20 The thickness of coal seams varies in this country The VOL . VI PLATE I COAL.
Page 49
... seams varies in this country The Upper Pennant series attains the maximum develop- | Cumber- field . Chestan neighbourhood of Sunderland , more. commencement of the carboniferous period is marked by | a mass of limestones known as the ...
... seams varies in this country The Upper Pennant series attains the maximum develop- | Cumber- field . Chestan neighbourhood of Sunderland , more. commencement of the carboniferous period is marked by | a mass of limestones known as the ...
Page 50
... seams above 12 inches thick , making a total of about 100 feet of coal , an amount that increases westward to 82 seams and 182 feet . The Lower Pennant series averages from 1100 to 1500 feet between the Taff Vale and Llanelly , but on ...
... seams above 12 inches thick , making a total of about 100 feet of coal , an amount that increases westward to 82 seams and 182 feet . The Lower Pennant series averages from 1100 to 1500 feet between the Taff Vale and Llanelly , but on ...
Page 51
... seams occurring in either division can be identified with certainty in the other , although only a few miles distant . The total thickness of the coal measures is about 2500 feet , the principal seams occurring about the middle , as is ...
... seams occurring in either division can be identified with certainty in the other , although only a few miles distant . The total thickness of the coal measures is about 2500 feet , the principal seams occurring about the middle , as is ...
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