Edison transmitter and a 'pony crown' receiver, New York, c1891. Telephone apparatus available to New York subscribers. This used an Edison transmitter and a 'pony crown' receiver (lower right of picture. Wood engraving. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Ann Ronan Picture Library |
Bildgröße: | 4080 px × 4280 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |