Musicians - Mary Hallock-Greenewalt

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	Musicians - Mary Hallock-Greenewalt

Mary Hallock-Greenewalt (born Beirut, Syria 1871; died 1950). She studied piano at the Philadelphia Conservatory of Music and then with Leschetizky in Vienna. She was a pianist who performed with the Philadelphia and Pittsburgh symphonies as a soloist.

She is best known for her invention of a type of visual music she called Nourathar. Her color organ, which she named "Sarabet" after her mother, required her invention of a number of new technologies. Among these devices was the rheostat, a patent that was infringed by General Electric and other companies. This instrument went through a series of refinements between 1916 and 1934. In 1946 she published a self-laudatory book on her "light-color playing" called Nourathar: The Fine Art of Light-Color Playing.

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