Transportation and the Location of Cities In spite of its many railroads radiating outward like the spokes of a wheel, and its steamship lines radiating to all parts of the world, Boston cannot rival New York. When the Hoosac Tunnel was cut through Hoosac Mountain in the northwestern corner of Massachusetts in 1874, thus shortening the distance by rail between Boston and the Mo- hawk valley, it was thought that the grain and meat of the fertile Middle West would be brought to Boston on their way to the European market. Only small quantities of these products, however, are sent through Boston, although the route from Chicago to Europe is 180 miles shorter via Boston than via New York. The heavy railroad grades between Boston and the Hudson-Mohawk valley explain a part of Boston’s disappointment, while the rest is largely due to New York's better harbor and to that city’s location nearer to the food-producing plains of the West and South. Why Philadelphia is the third largest city in the United States. Let us answer two questions in regard to Philadelphia: (1) Why has it grown to such great size? (2) Why is it not so large as New York? One reason for Philadelphia’s growth is its position on a good river harbor at the head of Delaware Bay. Another reason is that this harbor is the most convenient from which to ship the soft coal of west- ern Pennsylvania to the manufacturing cities of the New England coast. The hard coal of the Scranton and Wilkes Barre region in east- ern Pennsylvania can go to New York as easily as to Philadelphia, but the soft coal comes to Philadelphia, chiefly over the Pennsylvania Railroad, which crosses the Appalachian Mountains in the level valley of the Susquehanna. This Susquehanna route has more to do with Philadelphia’s present prosperity than has the city’s location at the junction of the Delaware and Schuylkill rivers. Three geographical reasons have helped to prevent Philadelphia from becoming as large as New York. First, although the Susque- hanna River provides a good route through the ridges of the Appala- 211 \ a ly Ty <r