Professor emeritus (Mechanical Engineering) Lee Langston recently began a new column entitled Technologue, in the July-August 2013 issue (Vol. 101) of American Scientist. For his first topic, Lee chose to profile “The Adaptable Gas Turbine,” covering the history, advantages and challenges, and current applications of gas turbines in jet engines and non-aviation applications such as natural gas pipeline compressors, ships and combined cycle power plants.