the 22nd floor, there are copper lanterns at each corner of the shaft, as well as finials atop each of the facade's ribs. The top floor, within the roof pavilion, contains double-height pointed-arched windows with Gothic tracery. The top floor was illuminated at night in what Corbett described as "publicity of the most convincing sort". Side facades With the exception of the light court, the east and west walls of the shaft are left largely blank, as Helmle & Corbett had assumed the adjacent lots would be developed in the future. This belief also prevented the inclusion of any cornices on the side facades, as they would overhang the lot line. To give emphasis to the side walls, the architects used trompe-l'œil brickwork. Three tones of brick are used to provide aesthetic emphasis to the side walls, giving the impression that the piers wrapped around all sides of the building. The facades are mostly made of buff brick, but dark brick is used for shadows and light brick is used for highlights. Vertical "ribs" are installed on the side walls from the ground to the top story. This aesthetic effect was coordinated according to the shadows cast by the average angle of the sunlight. On the 41st Street wing, the eastern wall contains similar trompe-l'œil brickwork to the shaft, while the western wall is clad in buff brick. Features The Bush Tower contains over of interior space. There are seven elevators in the building. When built, it contained four elevators, which were on the right (west) side of the 42nd Street entrance vestibule. The Bush Terminal Company was intended as a central marketplace where merchants or their buyers could examine and select samples of goods without having to go to the warehouse. A promotional document by the company promised a wide variety of merchandise, including various clothes, furnishings, furniture, household appliances, machinery, groceries, toys, musical instruments, and travel and sporting goods. Displays and sales were held at the Bush Tower, but shipping and forwarding service occurred at the Bush Terminal (now Industry City) facility in Sunset Park, Brooklyn. Structural features The foundation of the structure extends deep to the underlying rock layer. These foundations carry a total load of , distributed across 24 columns. The underlying ground conditions included irregular rocks and boulders within a layer of blue clay, as well as a stream about below ground. The upper stories