The mission of the Peirce edition Project (UQÀM) is to prepare the critical edition of texts written by Peirce between 1883 and 1909 for the Century Dictionary. The selection will represent the core of volume 7 of the Writings of Charles S. Peirce: A Chronological Edition. The transcription of relevant material — extracted from 57 manuscripts — is now complete, and the project's database presently holds 15,999 records/documents for 9,969 different words. The main sources are MS 1597 (Peirce's interleaved copy of the Dictionary, in which he indicated the words on which he worked, and added 3,497 definitions and comments), MS 1596 (518 index cards related to the dictionary, out of the extant 22,000), and the MS 1168-1177 series. The diversity of subjects to which Peirce contributed is quite impressive : although it was originally planned that he would be confined to philosophy, he contributed a considerable number of articles in the fields of logic, metaphysics, astronomy, mathematics, mechanics, weights and measures, universities, geodesy, religion, psychology and parapsychology, biology, chemistry, and even cocktails (57 documents). Some of these texts reveal a different Peirce than the one we are accustomed to, and the whole provides us with a precise image of his formidable erudition. The selection of the articles that will be published in W7 is not yet final, but it is already clear that the volume should provide the reader with a general overview of Peirce’s contribution to the gigantic Century Dictionary enterprise, on the one hand, and make available most of his definitions in logic, metaphysics, and mathematics, on the other hand. It should be mentioned that many definitions of Peirce's own vocabulary are to be found in those pages (phaneron, existential and essential graphs, the terminology of lations, and much more).

The project is directed by François Latraverse, with the steady collaboration of David Lachance, Jean Philippe Dell'Aniello, Marc Guastavino, Jérôme Vogel, Hélène Garcia, Jean-Marie Chevalier, Gwennaël Bricteux, Vincent Motard-Côté, Léane Sirois, Céline Poisson, Alain Voizard and André De Tienne. Others join the project from time to time. It is financed by the Social Sciences and Humanities Research Council (SSHRC) of Canada.