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Scientific American, Vol. 33, No. 22 (1875) (1875)

leaf 3

An illustration from Scientific American, Vol. 33, No. 22 (1875), 1875, leaf 3
active operation; the greatest depth have a similar regulation; but until that happy period ar- at present attained is about 75 fathoms. In addition to the pulation and resources. Landowners and farmers are inves- tives, it behooves us to consider the best means for amelio- shafts there is an open… … front of the main seat by turned, the limestone reposes. .. NES Pi NM. To the west of the limestone means of suitable standards. The standard is bolted to a are the coal measures, brought riser a little below the main into contiguity with the lime- seat, and is so shaped that it stone by a large…

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