Special features were--a miniature coal-mine shown by Iowa; a section of
the world-renowned Mammoth Cave in Kentucky; a statue of rock salt
representing Lot's wife, a contribution from Louisiana; a tunnel
containing a double tramway for the carrying of ore displayed by
Pennsylvania; a model of the largest lead-reducing works in the world from
Missouri; and a miner's cabin built of mineral specimens from the
different counties in the territory of New Mexico.
All the mining exhibits--in their selectness and profusion--gave evidence
of the inexhaustible wealth yet stored up for man's future uses
notwithstanding the geological fact, that the earth's crust has no great
profundity compared with its diameter.
The "_Golden Door_" an immense archway enriched to an extraordinary degree
with carvings, paintings, and overlaid with gold leaf, ushered us into the
TRANSPORTATION BUILDING. It was dedicated to present the origin, growth,
and development of the various methods of abridging distance used in all
parts of the inhabited globe--from remote antiquity up to the present day.
We were charmed with a striking vista of richly ornamented colonnades
which added considerably to the impressive effect of the exhibits.
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