A diamond cutters' wheel in use (top), and a plan and perspective of the wheel with various components (below). Etching by Defehrt after Louis-Jacques Goussier. From a general encyclopedia published in France between 1751 and 1772, with later supplements, revised editions, and translations. It had many writers, known as the Encyclopedistes. It was edited by Denis Diderot and, until 1759, co-edited by Jean le Rond d'Alembert.