. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ELEVATIO N Fig. 229. — Ore Roasters, Norway Furnace, 1883. (Am. Inst, of Mining Engineers.) If the quantities transported are 0, 0, 0 respectively, and the costof carriage is c dollars per ton, the distance for each being S, S, S, the totalcost (Thurston), K = cOS + cOS + cOS, should, other things being equal, be made a minimum. The notable present tendency in the iron industry is the lower average ironcontent in the ores used. * This tendency will undoubtedly co
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ELEVATIO N Fig. 229. — Ore Roasters, Norway Furnace, 1883. (Am. Inst, of Mining Engineers.) If the quantities transported are 0, 0, 0 respectively, and the costof carriage is c dollars per ton, the distance for each being S, S, S, the totalcost (Thurston), K = cOS + cOS + cOS, should, other things being equal, be made a minimum. The notable present tendency in the iron industry is the lower average ironcontent in the ores used. * This tendency will undoubtedly continue in thefuture as the more easily accessible portions of the richer deposits are worked a corollary to this is the observed tendency toward a decentralization of the * Iron Ores of the United States. Report of the National Conservation Commission, Vol. Ill,p. 483, February, 1909. Government Printing Office, Washington.
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