DIDEROT & D'ALEMBERT. Encyclopedia or reasoned dictionary of Sciences, Arts and Trades. By a society of literary people. Put in order and published by M. Diderot, & as for the Mathematical part by M. D'Alembert. Geneva, Pellet, 1777-1779, 36 vol. of text and 3 vol. of plates in-4, marbled calf, spine ribbed, richly decorated, fawn title. Total of 39 vols. Third edition illustrated with a portrait of Diderot and a portrait of Alembert, 9 tables and complete with hors-texte plates, some of them folding. Covers worn and rest. in vol. VI, VIII, IX, XIII,XIV,XXI, XXIV, XXV, spotting in vol. XXV, lower coif. missing in vol. XXIX, broken bit in vol. XXX.

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.