Cooper plate from the Encyclopaedia of Diderot and Alembert, first edition, in the library of the Maison de l’Outil et de la Pensee Ouvriere, with over 32,000 books, specialising in manual labour, housed in the Hotel de Mauroy, built c. 1560, in Troyes, Aube, Grand Est, France. The illustration depicts a workshop with stages of barrel making and scale diagrams of barrels and their parts. Picture by Manuel Cohen
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