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Jeux de Fonds
Material for Pipes
Acoustic Tones. See Quint.
. | Æolina derives its name from the Æolian harp. (A charming description * of this ancient instrument is to be found in Radaus' “Lehre vom Schall.") It is of soft stringtoned character, occurring in Germany and Switzerland on almost all large and small new organs as an 8-ft. solo stop. It is considered to be the most delicate of all stringed stops. The Æolina was originally a metal stop, but as the art of intonation in modern organ-building is capable of making the transition from wood to metal quite imperceptible, it is permissible to construct the lower notes of wood in this and some other stops. This stop is sometimes met with as an 8-ft. or 16-ft. reed (see Töpfer, “Orgelbaukunst,” vol. i. § 180), either like the Physharmonica, or with a small bell. Walcker, for instance, has placed on his new cathedral organ at Riga a 16-ft. Ælodicon (nearly related to the
* To obtain musical effects from the strings of an Æolian harp, you expose them to currents of air. This primitive instrument is made by glueing a thin sounding-board to an oblong wooden frame. From six to ten catgut strings, tuned in unison, are then stretched over two bridges fixed on the short ends of the frame. Placed in an open window or in an aperture of a tower, obliquely to the current of air, the Wind- or Æolian harp will give out the most beautiful harmonious sounds,