The Electro-Magnetic Telegraph; With an Historical Account of Its Rise, Progress, and Present Condition: Also, Practical Suggestions in Regard to ... With an Appendix, Containing Several Impor - Softcover

Inhaltsangabe

Excerpt from The Electro-Magnetic Telegraph; With an Historical Account of Its Rise, Progress, and Present Condition: Also, Practical Suggestions in Regard to Insulation, and Protection From the Effects of Lightning, Together With an Appendix, Containing Several Important Telegraphic Decisions and Laws

This will assist to indicate the rapid improvement made in the course Of eight years, for at the beginning of that time a report of one hun dred words was considered a good day's work for an Operator. What then may we not expect in the next eight years from the genius and invention Of man!

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