In about 1945 they replaced the tractor with a steam boiler and built a brick furnace beneath it to burn slabs of wood from the mill. The fire boiled the water and produced steam to power a stationary single-cylinder steam engine. As a ten-year-old boy, I was fascinated as Grandpa and Uncle Joe heated heavy steel rods in the forge and used an anvil to shape them into hooks. The hooks suspended the huge boiler from the roof timbers of the sawmill.
What fun! A side benefit of owning my own steam engine was a lesson in economics. Wood alcohol could only be obtained at a local drugstore at the whopping big price (in 1945) of ninety cents a pint plus three cents tax. That left barely enough of a dollar bill to buy a nickel candy bar. Since money was in short supply my steam engine seldom got fired up. Perhaps that was why it was still in working condition years later when my mother passed it on to the Washougal museum.