Paper, "De Analysi per aequationes numero terminorum infinitas", by Isaac Newton Undated, manuscript of the general method of infinite series for measuring curves developed by Newton, in reference to [Nicolaus] Mercator logarithmic series. Includes calculations expressed as calculus as well as figures. Organised in rules numbered I to III, followed by examples, notably to solve equations. Structure and notes in margins. [This is the manuscript sent by Isaac Barrow to John Collins along with MS/81/2 which provides the dating and place of creation: Trinity College, Cambridge] Title page annotated 'Sent by Dr Barrow to Mr Collins in a Letter dated July 31 1669', and in different hand, N.2 p.67 Numbered 2; 4 on the title page First published in "Analysis per quantitatum series" edited by William Jones (1711) then printed pp. 3-20 in first edition (1712) of Commercium Epistolicum and p. 67 of second edition (1722). c 1669