Steam Engine Made of Pipestone (Jan, 1931)
Steam Engine Made of Pipestone
RECENTLY a model steam engine, made back in 1888 by L.O. Pease, who was then 20 years old, was resurrected from a dusty attic. This unique engine, which caused quite a sensation in its day, was made entirely of pipestone, a soft, close grained stone found on the Sioux reservation in Minnesota. The only tools used were common household knives and files, and a crude lathe made from an old sewing machine. The engine is of the U valve type, with a 1-1/4-inch bore and a 2-1/4-inch stroke. Even the piston is of pipestone with stone piston rings.