Chalk production. 19th century engraving showing the production of chalk on the island of Ruegen,Germany,from extraction to shipping. The chalk is extracted from an open quarry (top left) and processed to remove impurities. It is then loaded into barrels and exported | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bildagentur-online / Tschanz |
Bildgröße: | 3599 px × 4902 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |