The City Hall is in the foreground; the Municipal Building, containing additional office room for city officials, is the tallest building shown.] _Powers of Municipal Corporations._--With the exception of a few cities, of which Houston, Texas, is an example, the powers that may be exercised by a city are specifically enumerated with great detail in the charter, and where that is done no other powers may be exercised by the city except such as are clearly incidental to, or implied in, those enumerated. Thus when the city of New York wished to build an elevated railway, it had to secure express authority from the legislature, which body insisted that the work should be carried out under the supervision of a state commission. Likewise when the city of Chicago wanted power to prescribe the width of wagon tires to be used on its streets, recourse had to be made to the state legislature for permission, though in neither case was the matter involved one which concerned directly anybody except the people of the cities affected. =Legislative Interference in the Affairs of Cities.=--The power of the state legislature over the cities has sometimes been employed to interfere in their local affairs and to force upon the cities measures or policies to which they were opposed. Thus the legislature of Pennsylvania passed an act requiring the city of Philadelphia to build an expensive city hall which cost the taxpayers of the city something like $20,000,000, though it was not a matter of direct interest to the people outside of the city. Likewise the legislature of Ohio required the city of Cleveland to erect a soldiers' monument at a cost of $300,000 against the wishes of the taxpayers who had to bear the expense. Sometimes the legislature employs its power of control over the cities in the interest of the political party which happens to be in control of the legislature, and it frequently passes laws relating to the hours of opening and closing of saloons in the cities when local sentiment may be opposed to such laws. But as to the moral right of the legislature to enact such laws as the last mentioned, there is a difference of opinion. The disposition of the legislature to interfere in the affairs of the cities by means of special acts--that is, acts applying to a single city--has come to be a crying evil and has been a cause of complaint from the people of nearly every large city. The New York legislature during a period of ten years passed nearly four hundred laws applying to the city of New York.