Section 1. Be it enacted, &c., That the councils of cities of the first class be and they are hereby authorized and empowered to regulate by ordinance the following subjects:
(One). The manufacturing, having, keeping, selling, using, transporting, and carrying of high explosives.
(Two). The manufacture, storage and keeping for sale of chemicals and combustibles.
(Three). The having, using, storing and keeping of benzine, naptha, gasoline, benzole and other petroleum or coal tar products, and articles containing the same.
(Four). The manufacture, transportation, sale, storage and use of acetylene and calcium carbide.
(Five). All subjects of a character and nature similar to those already enumerated.