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Fotothek df tg Alchemie Chemie Gef Ofen. Scan Deutsche Fotothek dftg color MIKCenter Berlin GmbH Abbildung Figur Frankfurt Main Lbeck alchemistische fen Retorten Sieb Papier Kupferstich cm Alchemie Chemie Gef Ofen ppn Druck Deutsche Fotothek gefrdert von der Deutschen Forschungsgemeinschaft Projekt Technikgeschichte Jh