CANADA MOUNTAIN 4PM PACIFIC 3 PM SAN FRANCSCO 'DENVER CENTRAL 5PM LOUISVLLE ASGA， EASTERN 6PM LOS ANGELES 'OKLAHOMA CTY MEMPHS > DALLAS. EL FA 色H0HoUU Areas that向not HOUSTON. ohserve Danylitht Time ALASKA GULF OF MEXICO 2 PM HAWAIL ALEUTIAN ANCHORAGE CANADA MEXICO ye绿area propoction 1 PM 把型” THE BAHAMAS CUBA
1. Development of Railroads (2) • The resources used in railroad–building not only promoted the growth of other industries, especially coal and steel, but also affected the routines of daily life in the United States; because railroad time became standard time for all Americans soon after the American Railroad Association divided the country into four time zones in 1883. The most important innovations of the railroads might have been the creation of the modern stockholder corporation and the development of complex structures in finance, business management, and the regulation of competition. After the Civil War, railroad mileage increased more than fivefold in the 35–year period from 35,000 miles in 1865 to 193,000 in 1900
POPULATION VS.RAILROAD MILEAGE (1830-1890) 70000 200000 60000 150000 (spuesnoy) 50000 40000 100000 uoneindod 30000 20000 50000 10000 0 0 1830 1840 1850 1860 1870 1880 1890