tion of the mineral wealth of the State in the crude condition of
its occurrences, and of her industrial advancement in the arts and
sciences as shown by the finished product. There were aggregated in the
exhibit statistical data, photographic views, transparencies and prints,
relief maps, specimens of crude, partly worked, and finished material.

The central feature of the exhibit, an octagonal shaft about 30 feet in
height, surmounted by an ornamental frieze, dome, and golden eagle, bore
statistics relating to the most important mineral productions of the
State during the year 1903. Among the relief maps reproducing mining
regions one, 12 by 8 feet, covered the whole State of Pennsylvania, and
showed coal measures, including the Pottsville conglomerate,
oil-producing areas, and gas territory.

Among the crude materials exhibited, coal, the greatest mineral product
of the State, was given preeminence. A piece of anthracite coal weighing
11 tons, said to be the largest unbroken piece of this coal ever taken
from the ground, was surrounded by pyramidal glass cases in which were
displayed anthracite coals of various kinds, quantities, and qualities
in all the marketable sizes, from lump to culm. Adjoining this display
was a working breaker illustrating modern methods of breaking, cleaning,
and assorting anthracite coal. Next to this display was probably the
most perfect and comprehensive coal-mine model ever constructed. It was
about 16 feet by 9 feet, and was accurately proportioned to the scale of
5 feet to 1 inch. The background of the model showed the surface plan of
a large mine, including a miniature breaker near the head of the mine
shaft to the breaker, small cars bearing slate and culm away from the
breakers, and coal cars upon a track which ran under the breaker for
convenience in loading the marketable product for shipment; also upon
the left hand, the fan supplying ventilation to the mine, the carpenter
shop, and the boiler room, and on the right hand, the men at work on
strippings (coal lying on or near the surface) with steam shovels.

Mounted prints and transparencies showed interior and surface views of
mines, and a valuable collection of coal fossils completed the State
exhibit of anthracite coal.

The bituminous coal of the State of Pennsylvania was represented by
twelve cross-sectional cuttings from well-known veins occurring in
different parts of the State and by models and views. Pennsylvania's
int