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  • An optical experiment using a giant lens to reflect sun-rays to create fire, with optical instruments scattered and fountains in a Baroque setting. Line engraving by C.N. Cochin the elder, 1737, after J. de La Jouë.
  • A chemist, surrounded by symbols and instruments of chemistry, advertising Richard Siddall, chemist in London. Etching by R. Clee, ca. 1750, after J. de Lajoue, ca. 1735.
  • A chemist, surrounded by symbols and instruments of chemistry, advertising Richard Siddall, chemist in London. Etching by R. Clee, ca. 1750, after J. de Lajoue, ca. 1735.
  • A chemist, surrounded by symbols and instruments of chemistry, advertising Richard Siddall, chemist in London. Etching by R. Clee, ca. 1750, after J. de Lajoue, ca. 1735.