The horn is a brass instrument consisting of about 12 feet (3.7 m) of tubing wrapped into a coil with a flared bell. It is descended from the natural horn and is informally known as the French horn.
GalleriesBrass Musical Instruments
Encyclopaedia Britannica (11th ed., vol. 13) (New York, NY: The Encyclopaedia Britannica Company, 1910)