Mo. Rev. Stat. § 77.550
The council may prescribe rules and provide methods by ordinance for the inspection, weighing and measuring of any commodity sold in the city in all cases not otherwise provided for by law, and may provide for the selling, weighing and inspecting of meats, poultry and vegetables, of butter, lard and other provisions and articles of food; and may provide for the inspecting and measuring of wood, coal and fuel, lumber, shingles, timber and all kinds of building material, and shall have power to appoint inspectors and measurers; and may make provisions for the inspection of steam boilers and all steam heating apparatus, and to license engineers using steam boilers in the city, and may regulate the place or places where hay, lime, lumber, timber, wood, coal and all kinds of fuel shall be exposed for sale, and fix the fees of the person or persons appointed to perform the duties named in this section.
§ 77.550, RSMo
RSMo 1939 § 6956