Wireless Transmission of Photographs / Second Edition, Revised and Enlarged 1919

A practical manual that presents the theory, experimental findings, and apparatus for wireless transmission of photographs. It reviews early experiments and the advantages and challenges of wireless versus cable systems, then explains transmitting and receiving equipment—covering spark gaps, stylus-type transmitters, selenium cells, cathode-ray and electrolytic receivers—and methods for synchronization and motor driving. The author outlines his telephotographic system and discusses Nernst lamps, film sensitivity, and exposure issues. Technical appendices provide procedures for preparing metal prints and guidance on lenses and optics to assist experimenters in construction, alignment, and photographic technique.