A new tradition : art in engineering -- pt. 1. The age of iron. Thomas Telford and the new art form ; Brunel, Stephenson, and railway forms ; Gustave Eiffel and the Crescent Bridge ; John Roebling and the Suspension Bridge ; The bridge and the tower -- pt. 2. The new age of steel and concrete. Jenney, Root, and the first Chicago school ; Big steel bridges from Eads to Ammann ; Robert Maillart and new forms in reinforced concrete ; Roof vaults and national styles ; The directing idea of Eugene Freyssinet ; Discipline and play : new vaults in concrete ; New towers , new bridges -- Epilogue : the idea of structure as art.