A DEEP ENTERPRISE. - It having been ascertained that
a mountain near Harrisburg, Pa., consists almost entirely of
immense beds of iron ore, and of excellent anthracite coal,
the enterprising proprietors, instead of sinking shafts and
raising this mineral wealth in the ordinary way, have
extended a level railroad tunnel through the heart of the
mountain; thus securing easy access to the beds of coal and
iron, which are piled up to the height of 1160 feet above
the level of the road. It is calculated that this mountain
alone contains coal enough to supply the city of New York
for 26,000 years.