No. 43 A. Experiments in Wireless Telegraphy. N.B. Under the Wireless Telegraphy Act

Postmaster-General, London, U.K.

Edité par London, 1922

A propos de cet article

Telegraphy. London. Experiments in Wireless Telegraphy. N.B. Under the Wireless Telegraphy Act, 1904, the Postmaster General's authority is necessary before any apparatus for wireless telegraphy is installed or worked. Authority for receiving, summary of conditions of issue. Printed sheet, 8 x 6½ inches, recto-verso, dated 17.7.(19)22. Condition of use of the heterodyne oscillator.

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Détails bibliographiques

• Titre: No. 43 A. Experiments in Wireless Telegraphy. N.B. Under the Wireless Telegraphy Act
• Éditeur: London
• Date de parution: 1922
• État de l'article: Very good
• Catalogues du vendeur:
  • Science
  • Ephemera
  • Telegraph