. . " light pole, or pole used to maintain trolley wire. for street railways any sign, bill, poster card or other substance or device to cut or in any way deface such pole. 6-119. ---DUTY OF POLICE. -It shall be the duty of the Chief of Police and City Policemen or any of tbem to tear down and remove all card., posters, and advertisements when be finds them and prosecute any person guilty of putting th" . . .