Art.

 1 5|   coke instead of charcoal as fuel. The process needed a big
 2 7|       in the coalmines, since fuel was to be had on the spot
 3 7|       and less expenditure of fuel. This was exactly what the
 4 7|   saving three-fourths of the fuel over the engines here, which
 5 7|   engines would save half the fuel used by the old engines,
 6 7|   according to the economy in fuel was very ingenious. It was
 7 7| one-third of the value of the fuel saved by the engine as compared
 8 7|  profits out of the saving of fuel; so that if we save nothing
 9 7|    usual stipulation that the fuel consumed is to be compared
10 8| between the work done and the fuel consumed. This can be measured
11 8|      the introduction of coal fuel, the iron industry was making