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Keywords from Image Description:
Christoph Julius Gravenhorst. Christoph Julius Gravenhorst deutscher Chemiker und Unternehmer Braunschweig en Christoph Julius Gravenhorst chemist and entrepreneur Brunswick Germany Johann Georg Krnitz Oekonomische Encyklopdie Band Verlag Joachim Pauli Berlin Johann Georg Krnitz Gebrueder Gravenhorst PDold Original upload