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low frequency wire tuning fork, F2
low frequency wire tuning fork, F2

low frequency wire tuning fork, F2

Datecirca 1893
Inventory NumberWJ0078
ClassificationTuning Fork
Subject
    Maker Anton Appunn 1839 - 1909
    Cultural Region
      Place of Origin
        Dimensionsdiameter of disks: 3.7 cm (1 7/16 in.)
        19.8 x 9.4 x 3.8 cm (7 13/16 x 3 11/16 x 1 1/2 in.)
        Material
          DescriptionTwo brass, concave disks are attached to the ends of steel wire. The wire is shaped as a "U" and mounted in a hollow, wooden handle.

          The maker's name, "APPUNN," is stamped on the edges of the disks. The concave sides are marked, "F2" and "44." The 44 refers to simple vibrations.
          In Collection(s)
          Signedon edges: APPUNN
          Inscribedon disk: F2 / 44
          Curatorial RemarksStoelting catalogue, pp. 29-30
          FunctionAppunn tuning forks were used to test the lower limits of audibility, including the detection of low pitches and frequencies.
          Historical AttributesA Harvard account book shows an expenditure of $102.00 for Appunn instruments in June 1893.
          low frequency wire tuning fork, C3
          low frequency wire tuning fork, C3
          Anton Appunn
          Date: circa 1893
          Object number: WJ0072
          low frequency wire tuning fork, E3 20
          low frequency wire tuning fork, E3 20
          Anton Appunn
          Date: circa 1893
          Object number: WJ0073
          low frequency wire tuning fork, B2
          low frequency wire tuning fork, B2
          Anton Appunn
          Date: circa 1893
          Object number: WJ0081
          low frequency wire tuning fork, B3
          low frequency wire tuning fork, B3
          Anton Appunn
          Date: circa 1893
          Object number: WJ0075
          low frequency wire tuning fork, E2
          low frequency wire tuning fork, E2
          Anton Appunn
          Date: circa 1893
          Object number: WJ0077
          low frequency wire tuning fork, G4
          low frequency wire tuning fork, G4
          Anton Appunn
          Date: circa 1893
          Object number: WJ0071
          low frequency wire tuning fork, D2
          low frequency wire tuning fork, D2
          Anton Appunn
          Date: circa 1893
          Object number: WJ0076
          low frequency wire tuning fork, A2
          low frequency wire tuning fork, A2
          Anton Appunn
          Date: circa 1893
          Object number: WJ0080
          low frequency wire tuning fork, G2
          low frequency wire tuning fork, G2
          Anton Appunn
          Date: circa 1893
          Object number: WJ0079
          low frequency wire tuning fork, G3
          low frequency wire tuning fork, G3
          Anton Appunn
          Date: circa 1893
          Object number: WJ0074
          electromagnetic tuning fork
          electromagnetic tuning fork
          Rudolph Koenig
          Date: circa 1889
          Object number: 1997-1-0882
          electromagnetic tuning fork and mercury interrupter
          electromagnetic tuning fork and mercury interrupter
          Rudolph Koenig
          Date: circa 1889
          Object number: 1997-1-0884