Important Theoretical Work Available to Purchase

IN this issue we publish the last section of the present part of DR J. H. ARGYRIS'S ‘Energy Theorems and Structural Analysis’. It may not be out of place to give some indication of the reasons for publishing a work of this length in the form of a series of articles, particularly as some of our readers whose first interest is not in the theory of structures may feel that a disproportionate amount of space has been devoted to it. Serial publication does mean that the results of such work as DR ARGYRIS has been doing appear at the earliest possible moment. Although the development of the theories has been going on for some time, the manuscript of each published section has only been assembled in its final form, and the illustrations drawn, about a month to six weeks before the appearance of the issue in which it has been published. This has meant that all concerned have had to work to a tight schedule, not least the author and his small team, and it has left little time for the solution of the complex problems of type‐setting with which our printers have had to deal. As a result of all this, we hope, the methods of structural analysis proposed will be available to the industry earlier than if publication had been delayed until the manuscript was complete, and the whole could be presented in book form. The series has aroused great interest, and we believe that it will have a considerable influence on the structural analysis of the next generation of aircraft.