CN volume:page. Charles Sanders Peirce: Contributions to The Nation. 4 vols. Edited by Kenneth L. Ketner and James E. Cook. Lubbock: Institute for the Studies of Pragmaticism, 1975–87.
CP volume.paragraph. The Collected Papers of Charles Sanders Peirce. 8 vols. Vols. 1–6, edited by Charles Hartshorne and Paul Weiss. Vols. 7–8, edited by Arthur W. Burks. Cambridge, Mass.: Harvard University Press, 1931–58.
EP volume:page. The Essential Peirce: Selected Philosophical Writings. 2 vols. Vol. 1, edited by Nathan Houser and Christian Kloesel. Vol. 2, edited by The Peirce Edition Project. Bloomington: Indiana University Press, 1992–98.
HPPLS volume:page. Historical Perspectives on Peirce’s Logic of Science. 2 vols. Edited by Carolyn Eisele. The Hague: Mouton, 1985.
NEM volume:page. The New Elements of Mathematics. 4 vols. in 5. Edited by Carolyn Eisele. The Hague: Mouton, 1976.
P followed by a number assigned by Kenneth L. Ketner et al. refers to a publication by Peirce as listed in Kenneth L. Ketner et al., A Comprehensive Bibliography of the Published Works of Charles Sanders Peirce: with a Bibliography of Secondary Studies. 3rd rev. edition (Lubbock: Institute for the Studies of Pragmaticism, 2012).
PM Philosophy of Mathematics: Selected Writings. Edited by Matthew Moore. Bloomington: Indiana University Press, 2010.
R followed by Robin catalogue and sheet number. Manuscripts held in the Houghton Library of Harvard University, as identified by Richard Robin, Annotated Catalogue of the Papers of Charles S. Peirce. Amherst: University of Massachusetts Press, 1967, and in Richard Robin, “The Peirce papers: a supplementary catalogue,” Transactions of the C. S. Peirce Society 7 (1971): 37–57. The sheet number, assigned by the Institute for Studies in Pragmaticism, provides each page with a unique identifier. With some exceptions, the numbering follows the order of the manuscript on the microfilm, including the identification sheet that precedes it (causing a one-page discrepancy where the manuscript pages themselves are numbered). The full Houghton Library call number is: MS Am 1632 (R), where R stands for the Robin catalogue number.
RLT Reasoning and the Logic of Things: The Cambridge Conferences Lectures of 1898. Edited by Kenneth L. Ketner. Cambridge, Mass.: Harvard University Press, 1992.
SS Semiotic and Significs: The Correspondence between Charles S. Peirce and Victoria Lady Welby. Edited by Charles S. Hardwick. Bloomington: Indiana University Press, 1977.
W volume:page. The Writings of Charles S. Peirce. Edited by The Peirce Edition Project. 7 vols. to date. Bloomington: Indiana University Press, 1982–2010.
WMS refers to reorganized Peirce manuscripts as listed in the chronological volume of the writings.
References to the Open Court Collection held at the Special Collections Research Center in the Morris Library of Southern Illinois University Carbondale are referred to by collection number, box number, and folder number; e.g., 27.91.17.