Accession Number: 2015.ph.710
14 universal resonators supported by a cast iron frame. The resonators can be adjusted by sliding them outward, range from UT2 (base C) to UT5 and can be connected to 8 manometric capsules, each supplied with gas (connection on back), through 8 input lines, originating from a single gas source in the back. A crank rotates the mirror that displays the flame signals that are emitted from the vertical row of gas burners which protrude from the capsules.’, ‘This instrument was used to visually analyse the constituents of a compound note. Activated resonators cause visible fluctuations in the jet flames which, in turn, are magnified by the Wheatstone mirror. This is a modification of an earlier model cat. No. 242a that was limited to analysing base C and its harmonics. This analyser uses universal resonators (with adjustable volumes) making it sensitive to a wide range of notes.
Primary Materials: Steel, Brass.
Dimensions (cm): Height = 92, Length = 85, Width = 35.
Very Good. The instrument has been modified for modern demonstration purposes.
Rudolph Koenig (1889) Catalogue des Appareils Acoustique, p. 86, No. 242;
J.A. Zahm (1900) Sound and Music, pp. 353-5.
Thomas B. Greenslade, Jr. (1992). The Acoustical Apparatus of Rudolph Koenig. The Physics Teacher, vol. 30, pp. 518 – 524.