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  • Gottfried Wilhelm, Baron von Leibniz. Line engraving by P. Savart, 1768, after E. Ficquet.
  • Gottfried Wilhelm, Baron von Leibniz. Line engraving.
  • Gottfried Wilhelm, Baron von Leibniz. Line engraving by C. F. Boetius after G. Leygeb.
  • Gottfried Wilhelm, Baron von Leibniz. Line engraving.
  • Gottfried Wilhelm, Baron von Leibniz. Line engraving by P. Savart, 1768, after E. Ficquet.
  • Gottfried Wilhelm, Baron von Leibniz: portrait, and facsimile of letter to Sir Hans Sloane about the discovery of calculus. Process print.