Benjamin Britten the apex of his reputation: it was almost universally hailed as a masterpiece." Shostakovich told Rostropovich that he believed it to be "the greatest work of the twentieth century". In 1967 the BBC commissioned Britten to write an opera specially for television. "Owen Wingrave" was based, like "The Turn of the Screw", on a ghost story by Henry James. By the 1960s Britten found composition much slower than in his prolific youth; he told the 28-year-old composer Nicholas Maw, "Get as much done now as you can, because it gets much, much more difficult as you grow older." He did
Screw turbine Screw turbine The screw turbine is a water turbine which uses the principle of the Archimedean screw to convert the potential energy of water on an upstream level into work. It may be compared to the water wheel. The turbine consists of a rotor in the shape of an Archimedean screw which rotates in a semicircular trough. Water flows into the turbine and its weight presses down onto the blades of the turbine, which in turn forces the turbine to turn. Water flows freely off the end of the turbine into the river. The upper end of the screw is