Edward D. McLaughlin, The Revised Statutes and Codes of the State of Washington Page 686, Image 738 (1896) available at the Making of Modern Law: Primary Sources

Public Nuisance, § 3910 – Certain Defined. It is a public nuisance—5. To carry on the business of manufacturing gun powder, nitroglycerine or other highly explosive substance, or mixing or grinding the materials therefor, in any building within fifty rods of any valuable building, erected at the time such business may be commenced.