[Illustration: 7-CAR TRAIN EQUIPPED WITH G-E MOTORS AND PC CONTROL] [Illustration: 30,000-KW. TURBINE AT 59^{TH} STREET STATION, INTERBOROUGH RAPID TRANSIT] [Illustration: INTERBOROUGH RAPID TRANSIT LINES] The Interborough operates the old subway traversing the length of Manhattan and also the four elevated lines in Manhattan and the Bronx. The original lines of this system were built in 1868 and were the first elevated tracks in New York and probably the first in the world. Other elevated lines were built between 1870 and 1880, and the present old subway was completed in 1904-8. Steam locomotives were superseded on the Manhattan Elevated line in 1902 and electric motor car trains were substituted. The original General Electric equipment installed at that time is still in daily operation after 20 years’ service. The present rapid transit facilities of the Interborough include the following branches: ═══════════════════════════════════╤══════╤══════ Division │Length│Total │ of │Single │ Road │Track ───────────────────────────────────┼──────┼────── Bronx Subway Line Contracts 1 & 2 │ │ Underground │ 19.56│ 62.97 Elevated │ 6.16│ 22.32 Contract No. 3 │ │ Atlantic Ave. │ ....│ .27 Astoria Line Elevated │ 2.33│ 6.87 Brooklyn Line │ 5.10│ 17.66 Corona Line Elevated │ 4.21│ 12.61 Clark St. Tunnel │ 2.31│ 4.67 Jerome Ave. Line │ 6.04│ 18.89 Lexington Ave. Line │ 5.00│ 21.15 149th St. Loop │ .55│ .55 Nostrand Ave. Branch │ 2.70│ 5.55 Pelham Bay Park Line │ 7.15│ 21.6 Queensboro Subway │ │ Underground │ 1.61│ 5.98 Elevated │ 1.03│ .... South Ave. Line Underground │ 4.19│ 15.73 White Plains Rd. Line Elevated │ 4.88│ 15.82 Manhattan Division Elevated │ 37.67│113.19 8th Ave. & 162nd. St. Connection │ .62│ 1.26 Queensboro Bridge Line │ 1.35│ 2.73 Webster Ave. Line │ 1.74│ 5.33 West Farms Subway Connection │ .5 │ 1.00 ├──────┼────── Totals │114.7 │373.15 ───────────────────────────────────┴──────┴──────