Describes research on working techniques used for bronzes from the Musée de Vienne and the Musée Gallo-Romaine de Fourvière. Objects made in Italy are difficult to distinguish from those made in Gaul according to Italian techniques. Discusses: General properties of bronzes and other copper alloys-True bronzes, Copper-zinc brasses, Bronzes and lead brasses, Complex copper alloys; Working techniques for bronzes and copper alloys-fundamental principles and study methods -- Dendritic structures of bronzes and copper alloys, Hammer hardening and annealing, Annealing structures of bronzes and copper alloys, Hammer hardening structures of bronzes and copper alloys, The problem of bronze tempering; Problems of analysis for ancient bronzes and copper al loys -- Influence of ancient metallurgical procedures, Influence of conservation milieu, Analyses of major constituents, analyses of impurities, Analysis method; Composition of antique bronzes and working techniques -- Bronzes annealed in sheets by hammering, Bronzes annealed in sheets without hammering, turned bronzes, thick moulded bronzes, Bronzes of various techniques; Observations on the different groups of objects -- Vases, Hooks, Mirrors, Statuary. Appendice-Brasses. The composition of the objects examined is given in six charts.