Newsletter of the Mercurians,
in the Society for the History
of Technology
Volume 10 No. 1,
November 1997
Book Reviews
Tube
Media and Revolution
Cover: SIGABA, the premier U.S. cryptographic instrument of the World War II period. William W. Ward discussed this rotor-based cipher device in his review of the National Cryptologic Museum in the November 1996 issue of this newsletter. See the story of spread-spectrum technologies, as we continue to analyze the histories of secure and coded communications. Photo courtesy of the National Cryptologic Museum in Maryland.