The chief of police shall be entitled to and shall receive the fees arising from the execution of all precepts issued by the mayor or others, which shall be the same as that of sheriffs and constables for like services. The board of town commissioners shall pass ordinances for the government and direction of the police, and fix their compensation. In time of exigency the mayor may appoint temporary additional policemen for such time as may appear necessary, not exceeding one week, who shall take the same oath and be subject to the same control as regular policemen.