Akira Nakano
September 13, 2021
This work was published as an e-book with a revised title, partial revisions, and additional materials from “Semaphore Telegraph” published by Asahi Shinbun Shuppan.
A semaphore telegraph is a device that transmits signals in the form of only three arms. Claude Chappe, who developed the semaphore telegraph and dedicated himself to the development of communication networks, and Napoleon, who actively worked on the development of communication networks. With a focus on both, the author follows the story of the people around the arm, as well as the amazing development of systems and technologies that are the origins of the Internet.
At the end of the book, there are photos of various documents related to Chappe’s semaphore telegraph.
【From the content introduction】
【Table of Contents】
Introduction
Chapter I: What Is the Semaphore Telegraph?
1.The bigger communications network in 200 years ago
2.Meaning of telegraph
Chapter II: Birth of the Semaphore Telegraph
1.Claude Chappe and his era
2.Communication conditions before the semaphore telegraph
3.Development story of the semaphore telegraph
4.Initial communication
Chapter III: Method of Communication
1.How do codes work?
2.Protocol of the semaphore telegraph
3.Operation of the semaphore telegraph
4.Origin of modern telecommunication networks
Chapter IV: Development of the Semaphore Telegraph
1.Expanding the semaphore telegraph network
2.Napoleon and the semaphore telegraph
3.The semaphore telegraph after Napoleonic era
4.The Ripple of the semaphore telegraph
Chapter V: Progress in the Electric Telegraph and Decline in the Semaphore Telegraph
1.Telecommunications in the earlier and the communications situation in japan
2.Decline of the semaphore telegraph