the east) was shifted eastward by another to accommodate a three-track connection from the original IRT subway north to the mainline Grand Central Terminal. There is a drainage pipe connecting the two tunnels between 37th and 38th Streets, as well as a cross-passage between 38th and 39th Streets. Design As with other stations built as part of the original IRT, the station was constructed using a cut-and-cover method. The tunnel is covered by a "U"-shaped trough that contains utility pipes and wires. The bottom of this trough contains a foundation of concrete no less than thick. Each platform consists of concrete slabs, beneath which are drainage basins. The original platforms contain I-beam columns spaced every , while the platform extensions contain columns with white glazed tiles. Additional columns between the tracks, spaced every , support the jack-arched concrete station roofs. The ceiling height varies, being about above platform level near the northern fare control areas, and lower in other portions of the station. There is a gap between the trough wall and the platform walls, which are made of -thick brick covered over by a tiled finish. The fare control areas are at platform level, and there is no crossover or crossunder between the platforms. The walls along the platforms near the fare control areas consist of a brick wainscoting on the lowest part of the wall, with bronze air vents along the wainscoting, and white glass tiles above. The platform walls are divided at intervals by buff and green mosaic tile pilasters, or vertical bands. In the original portion of the station, each pilaster is topped by green faience plaques depicting eagles, an allusion to the former 71st Regiment Armory at Park Avenue and 33rd Street; the eagles hold blue and white shields containing the number "33". A cornice with yellow and brown vine and fretwork patterns runs atop these walls. The platform extensions contain tiles with the number "33" atop the pilasters. Mosaic plaques with the words "33rd St." are also spaced at various intervals on the walls. The mosaic tiles at all original IRT stations were manufactured by the American Encaustic Tile Company, which subcontracted the installations at each station. The decorative work was performed by tile contractor John H. Parry and faience contractor Grueby Faience Company. The ceilings of the northern fare control areas contain plaster molding. The 1997 artwork at this station is Lariat Seat