Electricity generated using natural gas turbines was first produced for public use in 1939/1940 at a plant in Neuchâtel, Switzerland. The total output of the turbine was 4 megawatts (MW). Before this in 1937, Sun Oil had used a gas turbine to generate air and electricity for private use at its chemical plant in Philadelphia. In 1945, a two-shaft reheat gas turbine achieved a world record 10 MW output, followed in 1948 by a combined total output of 40 MW generated at the world's largest gas plant in Beznau, Switzerland. Clearly, Switzerland was a busy place for emerging natural gas technologies in the 1940s.