low frequency wire tuning fork, A2
Date: circa 1893
Inventory Number: WJ0080
Classification: Tuning Fork
Subject:
Maker: Anton Appunn (1839 - 1909)
Cultural Region:
Place of Origin:
Dimensions:
19 × 5.8 × 3.9 cm (7 1/2 × 2 5/16 × 1 9/16 in.)
Description:
Two 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 stamped, "A2" and "52." The 52 refers to simple vibrations, or vibrations per second.
The maker's name, "APPUNN," is stamped on the edges of the disks. The concave sides are stamped, "A2" and "52." The 52 refers to simple vibrations, or vibrations per second.
SignedAPPUNN
Inscribedon disk: A2 / 52
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.
