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Fotothek df tg Alchemie Chemie Ofen Fass. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Figur Frankfurt Main Lbeck alchemistischer Ofen Khlfass Retorte Papier Kupferstich cm Alchemie Chemie Ofen Fass ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte