electromagnetic tuning fork
Date: circa 1895
Inventory Number: WJ0124
Classification: Tuning Fork
Subject:
Maker: Max Kohl A. G. (founded 1876)
Cultural Region:
Place of Origin:
Dimensions:
7.6 × 18.5 × 11 cm (3 × 7 5/16 × 4 5/16 in.)
Description:
Small electromagnetically driven tuning fork of 500 VS fixed on a wooden base. An electric connector on one side provides current to the magnet in between the tines. On the other side, a hook-shaped piece of metal is screwed on the tine. With the help of the screw in front of it, this piece of metal was used to fine-tuned the fork. Such device was used in time measurement and graphic recording of data.
Signedon fork, stamped: MK
ProvenancePsychology Department, William James Hall, Harvard University.