Yü ku

Yü ku drum of China, made of a bamboo tube ca. 50 cm. (20 in.) long, 7 cm. (2½ in.) in diam., and a single head of snakeskin. A vibrating metal tongue is placed inside. It is tapped with bare fingers, and is often played together with the chien pan, principally by blind men. Also called yü t'ung (142). Moule, A. C. “A List of the Musical and Other Sound-producing Instruments of the Chinese,” in Journal of the North China Branch of the Royal Asiatic Society, Vol. 39. London, 1908.