Introducing his paper Mr. Weiss said that there was certainly one theme at least which might provoke an interesting discussion: in this almost completely unadorned theatre architecture and engineering had been compelled to find a common expression, architect and engineer had had to be tuned in to the same wavelength. How had this been achieved, and was the final product successful? He hoped that his friend, Mr. Philip Powell, who was present, would give his views on this as he was so much better able to do this than Mr. Weiss.