Telegraph key, telegraph
history, Vibroplex, Vibroplex bug, key, sounder, relay, morse code, morse
registers, railroad telegraph, telegraph sounder, call box, leg key, legless
key.
Wireless, wireless telegraphy, spark gap, radiotelegraph, spark gap
transmitter, crystal detector, wavemeter, Marconi, DeForest, Clapp Eastham,
General Radio, Lowenstein, Federal Telegraph, L. S. Brach, Branly.
Submarine cable, trans-atlantic cable, cable station.
Bug, semi-automatic key, Vibroplex, McElroy, Bunnell, Bunnell-Martin,
Mecograph, Signal Electric, Melehan Valiant, Melehan.
Code, American Morse Code, International Morse Code, Continental Code,
Signal Corps.
RCA, Western Union, Postal Telegraph, Globe Wireless.
history, collecting, restoring, preservation, museums, photos, information.
Manhattan Electrical Supply, J. H. Bunnell, Charles Williams, George
Phelps, Tillotson, Partrick and Carter, Greeley, Edison, Western Electric.