EditorialAstronomy, Instrumens. Quart de Cercle Mural, Machine to train the Limbe, Astronomy, space in which a quadrant was built, Signed: Benard Direx, Pl. 12, after p. 14, Benard (dir.), Denis Diderot; M. d'Alembert: Encyclop?die, ou dictionnaire raisonn? des...