Morse electric printing telegraph, c1882. Rear view of the instrument showing the roll of paper for recording messages and the transmitting key at C. D are wet cells (batteries) providing electricity. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Heritage Images / Oxford Science Archive |
Bildgröße: | 3710 px × 2820 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |