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The Structural Engineer, Volume 30, Issue 9, 1952
The CHAIKMXN. proposed a vote of thanks to the authors and declared the meeting open for discussion.
I. The evolution of steel construction, like any evolution, displays external and internal characteristics. The external characteristics are nearly always more evident, and can thus be more easily recognised than the internal ones. On the other hand, it is very often only the internal or intellectual characteristics that make evolution possible. In steel construction particularly, the external evolution and the great progress made during the last 1OO years would not have been possible without the evolution of the corresponding scientific bases. Professor Dr. F. Stussi
The paper describes an investigation into the accuracy of determination of the torsional properties of a noncircular section by the membrane analogy and by relaxation methods. A circular section with a circular groove was investigated, the section being considered most suitable because an analytical solution is available and because it has a region of high stress comparable to the re-entrant comers of structural sections in which the authors are interested. W.B. Dobie and A.R. Gent