Watson, aids Bell with telephone, 159;
  telephone partner, 175;
  helps demonstrate telephone, 175;
  telephones across continent, 248. 
Western Union, organized, 96;
  enters telephone field, 178. 
Wheatstone, 1;
  boyhood, 45;
  five-needle telegraph, 49;
  single-needle telegraph, 52;
  Wheatstone-Cooke controversy, 52;
  automatic transmitter, 53;
  bridge, 53;
  opposes Morse, 78;
  encourages Bell, 145. 
Wig-wag system, 26. 
Wireless telegraphy suggested, 188;
  invented, 202;
  on shipboard, 221;
  in the future, 230. 
Wireless telephone, conceived, 250;
  future, 260;
  in navy, 261.