The Institution of Structural Engineers : then and now / Cyril Morgan -- Reflections on 60 years of structural development / Fritz Leonhardt -- Philosophy of design with particular respect to buildings / Edmund Happold -- Some highlights in the history of bridge design / Anthony Flint -- Working on the edge--the engineer's dilemma / Jack Zunz -- History of structural design / Frank Newby -- Design for the developing world / Jörg Schlaich -- Research and development / Michael Horne -- Innovation in structural engineering--challenges for the future / Alan Davenport