There are 33 film reels containing Peirce's personal writings and 6 film reels containing correspondence. The items range over Peirce's lifetime (1839-1914), and they include essays, notebooks, lectures, book reviews, correspondence, and other compositions on pragmatism, metaphysics, logic, mathematics, semiotics, scientific methodology, astronomy, geodesy, and other subjects. The correspondence includes letters written by Peirce and letters written to Peirce; some of the correspondents are Louis Agassiz, Georg Cantor, Paul Carus, John Dewey, William James, Benjamin Peirce, Josiah Royce, and F. C. S. Schiller. While the multivolume editions, the Collected Papers of Charles Sanders Peirce (1931-5 and 1958) and the Writings of Charles S. Peirce: A Chronological Edition (1982-), have made many of the manuscripts available in print form, the microfilm currently is the most substantial resource of Peirce's complete writings.