| Lens manufacture, Paris World Exposition, 1889, (1900). Grinding a glass block to make lenses for giant telescopes. Artist: L Sabattier | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Heritage Images / The Print Collector |
| Bildgröße: | 4928 px × 3543 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |