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The Missouri Corn Palace in the Palace of Agriculture, west of present-day Skinker and Wydown boulevards. (Missouri History Museum)

Looking West from a Lagoon toward East End of the Palace of Machinery. 1904 World's Fair. Oil painting by John Ross Key, 1904. Missouri History Museum

Sacramento Valley Exhibit in the California section of the Palace of Agriculture at the 1904 World's Fair. Mr. Filcher, Mr. Wiggins, and Governor Pardee of California pictured.

The great Floral Clock, 112 feet in diameter, was a popular exhibit on a hillside near the Palace of Agriculture. The thousands of flowering plants on the clock’s face were 'timed' to bloom throughout the passing of the day's hours. The tip of the 74-foot long minute hand moved 6 feet every minute. The 1904 World's Fair Society owns the clock's master works, which is presently on display at the History Museum in Forest Park.

Near the Palace of Agriculture an impressive collection of  windmills (renamed- aerometers), occupied  several acres upon Agricultural Hill. This showcased harnessing the power of the wind for  agricultural uses: wind-powered irrigation, water pumping, corn shelling and grinding, to name a few, were shown.