Military telephone,1900

Numéro d’image : 11904581
Military telephone,1900
Military telephone. Historical artwork of French soldiers using a Berthon telephone at the end of the 19th century. Berthon invented a microphone,known as the Berthon system,which improved the quality of the telephone,which had been invented in 1876. The apparatus shown here involves the unwinding of the telephone wire carried on the back of one of the soldiers (right). The correct functioning of the telephone requires the system to be electrically earthed using the pointed metal stick at lower right. Systems like this allowed better communication by French armies. Artwork from A Travers l'Electricite (G. Dary,Paris,1900)
Licence : Droits gérés
Crédit: Science Photo Library / Terry, Sheila
Taille de l’image : 3576 px × 3056 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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