1907 Iowa Acts 81, ch. 76, § V(e).

If there be kept, used or allowed on the within described premises benzine, benzole, dynamite, ether, fireworks, gasoline, Greek fire, gunpowder, exceeding twenty-five pounds in quantity, naptha, nitroglycerine, or other explosives, phosphorous, calcium carbide, petroleum or any of its products of greater inflammability than kerosene of lawful standard, which last named article may be used for lights and kept for sale according to law, in quantities not exceeding five barrels.