XCF309503 Chemical Lectures, c.1809 (engraving) (later colouration) by Rowlandson, Thomas (1756-1827); (add.info.: The inscription \'Surrey Insitution\' on the door frame and the title \'Accum\'s Lectures\' on the book in the pocket of the man sitting in the left hand foreground suggests that this image depicts Friedrich Accum (1769-1838), the German chemist whose most important achievements were: advances in gas lighting; keeping processed foods from from dangerous additives; and the promotion of the science of chemistry to the general populace. He lived in London from 1793 to 1821.); English, out of copyright.