The Telegraph - In Six Parts

Here is a series about The Telegraph - from the early technological experiments to the application of local circuits and instruments used in early railway traffic control in Canada.

The first of this series was posted a few months ago. 

Part 1 - A Few Questions and Early Electric Technology

Part 2 - Communication Before ... Europe Eliminates Distance

Part 3 - Meanwhile in Canada ...

Part 4 - Power for the Wires

Part 5 - Instruments and the Wire Line

Part 6 - The Switchboard, Graduation!