Kitten Vintage Mackay

  In standard telegraphy,  a complete circuit (two wires) was used.  The first step towards wireless electrical telegraphy was discovered ...

Last week I looked at the development of the telegraph.  The original Morse telegraph printed code on  punched tape, with the operator, by ...

  Map showing the position of the cable from London to New York In 1842, Morse had submerged a telegraph wire insulated with tarred ...

  If you’ve read or seen Terry Pratchett’s Disc World series, and Going Postal in particular, you will understand what a shutter semaph...