The three clerestory windows make three arches with four piers. In front of each pier stands a great Sienna column crowned with one of four symbolic figures, each, in the strength of the male, emblematic of force. First on the left is "Electricity," grasping the thunderbolt, and standing with one foot on the earth, signifying that electricity is not only in the earth but around it. The man with the lever that starts an engine represents "Steam Power." "Imagination," the power which conceives the thing "Invention" bodies forth, stands with eyes closed; its force comes from within. Wings on his head suggest the speed of thought. At his feet is the Eagle of Inspiration. "Invention" bears in his hand a winged figure,--Thought, about to rise in concrete form. The eagle appears as a symbol of the United States, on the entablature carried across the opening below the arch on two Corinthian columns in each embrasure. The lower third of each of these shafts is decorated with a cylindrical relief representing the genii of machinery, flanked by human toilers and types of machines. The genii are blind, as the forces developed by machines are blind. There are only two of these cylindrical friezes, but they are repeated many times on the columns at either end and at the main entrance, and on the pairs of columns that flank the minor openings in the western wall. Over the main entrance the gable is extended to enclose a majestic triple vestibule, backed by the same effect that appears at the palace ends, but with the entablature and its supporting columns repeated across the outer arches. (p. 111.) With the exception of the spandrels on the transverse arches, the sculptural decoration here is the same as that described for the end entrances, though more often repeated. The spandrels represent the application of power to machines. All this decoration is the work of Haig Patigian, of San Francisco. Before the main entrance stands the only example, in the Exposition sculpture, of the work of the dean of American sculptors, Daniel Chester French. This is his noteworthy group, the Genius of Creation. (p. 147.) Other statues by French will be found among the exhibits of the Fine Arts Palace. The Genius of Creation was placed here at the last moment. It had been intended for the Court of the Universe, while Douglas Tilden's group of "Modern Civilization" was to have stood before the Palace of Machinery. When this was not completed, the Exposition wisely decided that the great court already had enough statuary, and ordered French's group erected in its place.