1903 Or. Special Laws 31, An Act to Incorporate the City of Portland, ch. 3,§ art. 4, § 73, pt. 36-38

36. To regulate or prevent the storage, manufacture, and sale of dangerous, explosive, or combustible materials, including gunpowder, dynamite, giant powder, calcium carbide, nitroglycerine, oil, and gas, and to provide for the inspection of the same; to prevent, by all proper means, all risks of injury or damage by fire arising from negligence, or otherwise; 37. To regulate the transportation of gunpowder, dynamite, nitroglycerine, and other combustibles and explosives through the streets of the city; 38. To regulate and prohibit the use of all guns, pistols, and firearms, missle weapons, fireworks, firecrackers, bombs, and detonators of all descriptions;