Approach Station Tracks Tracks Broad Street Station, Philadelphia 4 16 Market Street Station, Philadelphia 4 13 North Station, Boston 8 24 South Station, Boston 8 28 Union Station, St. Louis 6 32 Union Station, Washington 6 33 Northwestern Station, Chicago 6 16 Lackawanna Terminal, Hoboken 4 14 Pennsylvania Station, New York 2 21 Grand Central Station, New York 4 32 But the approach and train-shed tracks are only a part of the yards that are necessary at every large passenger terminal. Certain provisions are necessary for mail and express service (freight of every sort is handled as far as possible in separate yards and terminals), and extensive provision for the storage and care of cars and motive power. In the last case, it becomes advisable to have the roundhouse, or roundhouses, for locomotive storage within short striking distance of the terminal station. These are vast structures, their very form requiring large tracts of land. The American plan of radiating engine-storage tracks from a common centre, occupied by a turntable, has never prevailed in England. Some few attempts have been made in this country to build parallel storage tracks, with the transfer table for an operating arm, but almost every attempt of this sort has been induced by a necessity for unusual economy in land-space. We shall need the turntables as long as we continue to use steam as a motive power, and the early method of grouping storage tracks and radii from the table has never lost its favor with operating officers. A full-size roundhouse, with a diameter approximating 300 feet, has as its necessary accessories, facilities for coaling the locomotives--several at a time--as well as supplying them with water, sand, and other necessities. Possibly the terminal will be big enough to demand shop facilities for trifling repairs and maintenance of both cars and motive power. A big passenger terminal is a much bigger thing than that gaudy waiting-room in which you sit, whilst your train is being made ready to take you out from the city.