A city ordinance prohibited the installation of gasoline filling stations within the city except after obtaining the written consent of 51 per cent of the property owners within a radius of six hundred feet from the site. Relator, without obtaining the required consent, asked for a writ of mandamus, which was refused. The court held the regulation not arbitrary but substantially relating to the public safety and welfare, and not a delegation of legislative powers. State ex rel. Standard Oil Co. v. Combs, 129 Ohio St. 251, 194 N. E. 875 (1935).