NMLP P-042589 · True-first precedence · minted 2026-07-19
Encyclopédie, ou Dictionnaire raisonné des sciences, des arts et des métiers
Denis Diderot and Jean le Rond d'Alembert (editors) · Briasson, David l'aîné, Le Breton and Durand, Paris (vols 1-7); vols 8-17 under the false imprint 'A Neufchastel: Chez Samuel Faulche & Compagnie' · 1751
The Paris folio is the true first and the census is right that the Geneva, Lucca and Livorno reprints and unauthorized editions are far commoner than the true Paris printing; later quarto and octavo formats also circulate. Format plus the imprint sequence is the discriminator: the first is folio, with Paris on volumes 1-7 and Neufchastel/Samuel Faulche on volumes 8-17. Complete sets as usually assembled run to 35 volumes by adding Panckoucke's Supplément (5 volumes — 4 of text and 1 of plates; Paris: Panckoucke, Stoupe and Brunet; Amsterdam: Rey, 1776-1777) and the Table analytique et raisonnée (2 volumes, Panckoucke/Rey, 1780). Those 7 volumes are Panckoucke's supplement and are not part of the first edition proper; a 28-volume set is complete as a first edition, and note that some catalogues count 12 plate volumes by folding the Supplément's plate volume into the plate sequence.
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New Mexico Literacy Project — True-first precedence NMLP P-042589 for "Encyclopédie, ou Dictionnaire raisonné des sciences, des arts et des métiers" by Denis Diderot and Jean le Rond d'Alembert (editors) (https://newmexicoliteracyproject.org/id/point/p-042589, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).