Siemens galvanometer, c 1890.

 
Siemens galvanometer, c 1890.
4 0 c m
 
36cm
actual image size: 28cm x 32cm

Description

This device was used to locate electrcity leaks, bad contacts and faults in telegraph wires. Galvanometers would compare the current in two similar wires, and then make a diagnosis.

Image Details

Image Ref.
 
10212063

© Science Museum / Science & Society Picture Library

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