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Description
Solenoid assembly. Appears to be part of a mechanism for balancing electric force through the solenoid using a balancing beam. Possibly related to relay development. Photograph is numbered PT-102. A cyanotype of the same image is also included.
Type
image
Format
Black & White
Identifier
FE962E4B-836D-4892-8BE7-344511375937 2003-36-148f
Subject
Radio--Transmitters and transmission (LCSH) Federal Telegraph Company Solenoids (LCSH) Pipes (Conduits)
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