Rolly Martin Country
Exploring Canadian railways, technology, et cetera
Saturday, July 4, 2015
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!
David J Gagnon
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