The Turn of the Screw (opera) used in the lesson scene have been examined in more detail for their paedophilic innuendos. The line "The ceremony of innocence is drowned" sung by Quint and Miss Jessel is taken from the poem "The Second Coming" by W. B. Yeats. Notes Cited sources Other sources The Turn of the Screw (opera) The Turn of the Screw is a 20th-century English chamber opera composed by Benjamin Britten with a libretto by Myfanwy Piper, "wife of the artist John Piper, who had been a friend of the composer since 1935 and had provided designs for several of the operas". The libretto
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