Here are entered works on the small organ, used chiefly by street musicians, in which a barrel with pins or staples is activated by a hand crank. Works on the mechanical piano, used chiefly by street musicians, in which a pinned barrel or cylinder is activated by a hand crank are entered under [Barrel piano.] Works on the bowed string instrument, usually shaped like a viol, with a crank at the end opposite the pegbox are entered under [Hurdy-gurdy.]