[Ordinances] of the City of Denver, § 12. No person shall keep at his place of business or elsewhere within this city a greater quantity of gunpowder or gun-cotton than twenty-five pounds at one time, and the same shall be kept in tin or copper canisters or cases containing not to exceed five pounds in each and in a situation remote from fires, lighted lamps and candles, and from which they may easily be removed in case of fire; and no person or persons shall sell or weigh any gunpowder or guncotton after the lighting of lamps in the evening unless in sealed canisters or cases; and no person shall be allowed to keep nitro-glycerine in any part of said city. A violation of any of the provisions of this section shall subject the offender to a fine not less than ten dollars nor exceeding one hundred dollars. § 13. It shall be lawful for the Mayor or any member of the City Council, the Chief of Police or police officers or Chief or Assistant Chief Engineer, when any of them shall have cause to suspect that any gunpowder, gun-cotton or nitro glycerine is concealed or kept within the city, in violation of the provisions of this ordinance, to search any place in said city for the purpose of determining whether any gunpowder, gun-cotton or nitro-glycerine is concealed or kept as aforesaid. Any person who shall obstruct or hinder any such officer, making search in the execution of his duties under this section, shall forfeit and pay to said city for each offense a sum not less than ten dollars nor more than one hundred dollars.