FUTURE NEW YORK will be pre-eminently the city of skyscrapers. The first steel frame structure that was regarded as a skyscraper was the Tower Building at 50 Broadway, a ten story structure 129 feet high. There are now over a thousand building of that height in Manhattan. The best known skyscrapers are the Singer Building, 612 feet high, the Metropolitan Building, 700 feet high; and the Woolworth Tower which towers above them all and rises to a height of 790 feet. The proposed Pan American Building is to be 801 feet high.