Show Must Protect the Salmon WASHINGTON March 1SThe secretary of the treasury has issued a circular to the customs officers calling attention to the provisions of the act for the protection of salmon fisheries in Alaska ani instructing instruct-ing them to se that its requirements are strictly observed and that no dams barr cades or other obstructions are placed in any of the rivers of Alaska with the purpose pur-pose of the result of preventing or impeding the ascent of salmon or other anadromous species to their spawning grounds and speces should any such obstructions be discovered to warn them t immediately remove them and thereafter to report persons to the United States attorney of Alaska for prosecution cution under the law Officers of the rev nue marine service on duty in Alaska are also requested so far as possible t assist in the enforcement of the statute |