Piano quatuor

Piano quatuor (Fr.: quartet piano), improved *piano violon of Gustave Baudet of Paris, patented May 21, 1873; a keyboard instr. in form of a *cottage piano, with one string per note set in vibration by means of a metal cylinder covered with papier-mâché and rosined, rotated by a treadle (149). Norlind, Tobias. Systematik der Saiteninstrumente. Stockholm, 1936; Hanover, 1939.