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Scientific American, Vol. 55, No. 8 (1886) (1886)
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d from the derrick by been selected, to place the foundation timbers solidly, a “reverse” cord, a pull of the and, when the drilling is to be carried on in winter, cord raising the link and re- a temporary house may bgnecessary for the protection of the engine. When a well is to be so large that… … © 1886 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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