Newsletter of the Mercurians, in the Society for the History of Technology
Volume 11, No. 1, November 1998
Misreading the Supreme Court: A Puzzling Chapter in the History of Radio
Access Denied: The Beginning and End of the Information Society
Cover: Although Claude Chappe had abandoned shutter telegraph technology by 1795 in favor of a semaphore system for use in France, several English experiments continued with this type of visual telegraph. Fog and smoke made detecting its signals difficult, however, and the apparatus set up on the Admiralty Building in London could be used only 25 days a year, on average. The Admiralty Office published this key to its new telegraph in 1796. (Rollo Appleyard, Pioneers of Electrical Communication [London: Macmillan and Co, Ltd., 1930], pp. 290-3.) See"Toward a History of Information Systems."