[Illustration: XXXVIII. CHICAGO. THE SHERIDAN ROAD NORTH OF GLENCOE. From the Report of the Special Park Commission.] These suburban residents are dependent on the city for a livelihood, and either directly or indirectly pay the taxes that support the municipality. They are vitally interested in adequate and convenient means of transportation, in the protection of life and property, and in well-ordered home surroundings. Thus it happens naturally that as the city grows the functions of the various governing bodies are extended over areas outside the city limits. The administrative county of London has an area of but 118 square miles; but the greater London over which the metropolitan and city police have jurisdiction comprises 693 square miles, and includes a population of two millions outside of the county. The water-board and the sanitary authorities also have authority far beyond county limits. Boston, first among American cities, realized the advantages of co-operation between the great city and outlying districts. In 1889 the Massachusetts legislature created a metropolitan sewage commission, and later a metropolitan park commission, with jurisdiction over thirty-seven distinct municipalities; and to-day it is proposed to extend police jurisdiction and fire protection over substantially the same area. The Boston park system, developed through the co-operation of these various towns and cities, is famed for its beauty and variety. Beginning with the great ocean beach at Revere, where on a summer day one hundred and fifty thousand persons enjoy the bathing privileges, broad parkways sweep around the city, enveloping on their way great stretches of fen and lofty hills, until again salt water is reached at Nantasket, where another bathing beach as large as the first furnishes refreshment and recreation. Again, it is not without effect on the people of the outlying towns that Massachusetts Avenue keeps its name as it traverses Boston, Cambridge, Arlington, Lexington, and Concord; and that Beacon Street maintains its integrity from Boston through Brookline to Newton. Throughout the entire region one and the same spirit prevails—a spirit of love for and loyalty to the city set on three hills, which dominates the entire region. It would be no more difficult to secure the co-operation of Illinois, Wisconsin, and Indiana in planning for the continuous development of the Lake shore than it has been for New York and New Jersey to combine for the preservation of the Palisades of the Hudson and the development of their park possibilities.[16]