The Romance of Modern Invention

The Romance of Modern Invention

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"[...]"electric ear" would detect the currents passing through the wire. Wireless telegraphy is possible because mankind has discovered instruments which act as electric ears or eyes, catching and recording vibrations that had hitherto remained undetected. The earliest known form of wireless telegraphy is transmission of messages by light. A man on a hill lights a lamp or a fire. This represents his[...]."show more

Product details

  • Paperback | 214 pages
  • 152 x 229 x 11mm | 290g
  • Createspace
  • United States
  • English
  • black & white illustrations
  • 1507590954
  • 9781507590959