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Capriccio, Op. 85, is the final opera by German composer Richard Strauss, subtitled \"A Conversation Piece for Music\". It received its premiere performance at the Nationaltheater München on 28 October 1942. Strauss and Clemens Krauss wrote the German libretto, but its genesis came from Stefan Zweig in the 1930s, and Joseph Gregor further developed the idea several years later. Strauss then took it on, but finally recruited Krauss as his collaborator. Most of the final libretto is by Krauss.

Amos Emerson Dolbear was an American physicist and inventor. Dolbear researched electrical spark conversion into sound waves and electrical impulses. He was a professor at University of Kentucky in Lexington from 1868 until 1874. In 1874 he became the chair of the physics department at Tufts University in Medford, Massachusetts. He is known for his 1882 invention of a system for transmitting telegraph signals without wires. In 1899 his patent for it was purchased in an unsuccessful attempt to interfere with Guglielmo Marconi's wireless telegraphy patents in the United States.