Every junk dealer shall keep a book in which shall be written in ink at the time of their purchase a full and accurate description of each and every article purchased, together with the full name, residence and general description of the person or persons selling the same, and said book shall at all times be open to inspection by the sheriff of the county, or any of his deputies and any member of the police force in the city or town, and any constable or other municipal or county official in the county, in which said junk dealer does business. No entry in said book shall be erased, mutilated or changed.