De Methodis Serierum et Fluxionum
Method of Fluxions and Infinite Series
Method of Fluxions is a mathematical treatise by Sir Isaac Newton which served as the earliest written formulation of modern calculus. The book was completed in 1671 and posthumously published in 1736.Wikipedia →
Written c. 1671 but only published posthumously. First published in English translation in 1736 by John Colson, the original Latin text was subsequently published in 1742.
Translations

A Source Book in Mathematics
tr. David Eugene Smith, Vera Sanford, Wooster Woodruff Beman, Martin A. Nordgaard, Anna Savitsky, Jekuthiel Ginsburg, E. T. Bell, Florian Cajori, Laura Guggenbuhl, Ralph G. Archibald, D. H. Lehmer, Thomas Freeman Cope, J. D. Tamarkin, L. Leland Locke, Mark Kormes, Nevin C. Fisk, R. B. McClenon, Edward E. Whitford, Eva M. Sanford, W. H. Langdon, Helen M. Walker, Mary M. Taylor, Louis Weisner, Albert A. Bennett, C. Raymond Adams, Lao G. Simons, Frances Marguerite Clarke, Nathan Altshiller-Court, Morris Miller Slotnick, Roger A. Johnson, J. S. Turner, Henry P. Manning, Joseph Seidlin, Marcia L. Latham, Arnold Emch, James Singer, Henry S. White, Raymond Clare Archibald, Herbert P. Evans, E. Amelotti, Henry A. Ruger, Julian L. C. A. Gys, Evelyn Walker, Lincoln La Paz, H. Bateman, J. P. Kormes, D. Darkow · Dover · United States · 1959