*199. The Borough Authorities.*--The difference between county and municipal boroughs is thus one of degree of local autonomy, not one of forms or agencies of government. The charters of all boroughs have been brought into substantial agreement and the organs of borough control are everywhere the same. The governing authority is the borough council, which consists of councillors, aldermen, and a mayor, sitting as a single body. The councillors, varying in number from nine to upwards of one hundred, are elected by the voters of the borough, either at large or by wards, for three years, and one-third retire annually. The aldermen, equal in number to one-third of the councillors, are chosen by the entire council for six years, and are selected usually from among the councillors of most prolonged experience. The mayor is elected annually by the councillors and aldermen, frequently from their own number. In boroughs of lesser size re-elections are not uncommon. Service in all of the capacities mentioned is unpaid. The council determines its own rules of procedure, and its work is accomplished in large measure through the agency of committees, some of which are required by statute, others of which are created as occasion demands; but, unlike the county (p. 189) council, the council of the borough cannot delegate any of its powers, save those relating to education, to these committees. The mayor presides over the council meetings, serves commonly as an _ex-officio_ member of committees, and represents the municipality upon ceremonial occasions. The office is not one of power, although it is possible for an aggressive and tactful mayor to wield real influence. The permanent officers of the council include a clerk, a treasurer, a medical official, a secretary for education, and a variable number of inspectors and heads of administrative departments.