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Scientific American, Vol. 50, No. 3 (1884) (1884)
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be effected by means the center and blast holes being drilled all around. which is to be found in the market in ready-made cartridges. of an electric distribution furnished by the same generating The quantity of powder to be used is from six to seven kilo- Rock cutting, which is employed only in… … © 1884 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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