For the purpose of performing all necessary duties relating to the establishing, making, enlarging, extending and maintaining public parks and for enforcing the rules and regulations ordained by the county commissioners for the conduct of the patrons thereof, the said county commissioners are hereby authorized to employ or appoint and equip proper persons to do all necessary and proper work connected therewith, including police duty, the compensation of all persons so employed to be fixed by the salary board of the county.
16 P.S. § 6033