Babbage (Charles) Observations on the Notation Employed in the Calculus of Functions, offprint from' the Transactions of the Cambridge Philosophical Society', presentation inscription 'Dr. Gregory from the author' to title, foxing and some water-stains to title, spotting, Cambridge, J. Smith, 1820 bound with Idem. An Essay Towards the Calculus of Functions... Communicated by W. H. Wollaston, M.D. Sec. R.S. Read June 15, 1815 offprint from 'the Philosophical Transactions of the Royal Society of London for the Year 1815', Bulmer, 1815 and Philip (A.P. Wilson) Some additional experiments and observations on the relation which subsists between the nervous and sanguiferous systems... Communicated by T. Andrew Knight, Esq. F.R.S. Read June 15, 1815, offprint from 'the Philosophical Transactions of the Royal Society of London for the Year 1815', Bulmer, 1815, together 3 works in 1 vol., contemporary wrappers, spine repaired, a little creased, 4to.*** Two rare works by Babbage, the first inscribed to a fellow Cambridge mathematician.The first paper is the first of many papers that Babbage devoted to the problem of notation in mathematical reasoning, the second is the highly significant Essay towards the Calculus of Functions, both are rare."It can be said with some assurance that no mathematician prior to Babbage had treated the calculus of functions in such a systematic way. Babbage must be given full credit as the inventor of a distinct and important branch of mathematics." - J. Dubbey, The Mathematical World of Charles Babbage.Olynthus Gilbert Gregory (1774-1841), English mathematician.