Ads like this remind us that work was going on back in the States, even in the most remote areas, to support the war effort. From trees come airplane factory trusses and plywood trainers. When I see this, I'm also reminded of the Japanese attempts to send long-range balloons with incendiary devices to set fires in the forests of the Northwest. Notice that the company was based in Oregon but set up an office in Washington, D.C. to be where the procurement action was.