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2 letters to Owen Williams, 22-30 Nov 1806, relating to copper and timber production. Including 3 sheets of tables and calculations.

Student's notes on lectures on Algebraic Geometry and the Calculus, given by Augustus De Morgan at University College London from 11 March to 13 May 1847.

Letters and papers relating to Gottfried von Leibnitz's claim to primacy over Sir Isaac Newton in the discovery of calculus. Including correspondence between H Sloman, William Hepworth Dixon (editor of The Athenaeum), W Metcalfe, Augustus De Morgan and a Mr de Fanget, 1861-1863. Many items are autograph and bear signatures.