National Geographic : 1956 Mar
315 Albert E. Lombard. Jr. Solar Furnace in the Pyrenees Creates Heat of 6,000° F. and Melts the Hardest Metals France traps solar power at Mont Louis because the sun there shines nearly 300 days a year. This 35-foot reflector catches rays from a flat mirror that tracks the sun automatically. Its 3,500 pieces of glass bend the beams to a blistering focal point, leaving no waste products as in chemical combustion. The process promises production of high-temperature materials such as refractory linings for steel furnaces.