L. Bradley Circular Resistance Box

Title

Description

Circular resistance box manufactured by L. Bradley & Co. in Chicago. Patent date is Jan. 7, 1873. Construction of box consistent with 1870s technology. Box was probably used in trouble shooting telegraph or possibly telephone lines. We have no further information about the box.

Identifier

em_311

Collection

Electricity_and_Magnetism

Creator

L. Bradley & Co.

Source

Storage Location F4a

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