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  • John Haighton. Stipple engraving by J. Kennerly, 1818, after H. Ashby.
  • Chemistry: symbols of elements and substances. Coloured engraving by H. Ashby, 1799, after W. Jackson.
  • Chemical characters. Engraving by H. Ashby, 1799, after W. Jackson.
  • Chemistry: symbols of elements and substances. Coloured engraving by H. Ashby, 1799, after W. Jackson.