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Mr. H. J. DEANE, B.Eng., M.Inst.C.E., M.I.Mech.E. (Past President), proposed a hearty vote of thanks to Mr. McCarthy for the care and trouble he had devoted to the preparation and presentation of the paper, and assured him that the meeting had listened to his explanations of the many interesting slides with great satisfaction; they also appreciated the work he had done as Chairman of the Concrete Piling Panel.
INTRODUCTION BY THE CHAIRMAN. AS President of the Institution in whose building we are assembled, I want to assure you all of the great pleasure it gives me to welcome the members of the British Constructional Steelwork Association and the Institution of Structural Engineers and their guests here tonight. It is my privilege to introduce to you Herr Alfred Mehmel, who is a member of the German Air Ministry, and has had under his charge a great deal of aerodrome constructional work. He is to deliver a lecture to us to-night entitled “Modern Aeroplane and Seaplane Hangars.” I understand that some of you had the privilege of hearing a paper in Berlin last year which Herr Mehmel read before the International Association of Bridge and Structural Engineers. The paper which we are to hear to-night has been arranged for those of us who were not so fortunate as those present on that occasion. Dr. Ing. Alfred Mehmel
DURlNG the experience of a designer of steel cylindrical tanks for containing liquids such as water, oil, etc., or any liquid having a specific gravity not, differing appreciably from unity, the opinion was formed that the usual method of computing the sizes of tank side plates by numerical calculat8ion was not by any means an ideal one, as, in order to arrive at the most economical design, it was usually necessary to work out numerous examples before being in a position to decide upon the final construction. It was tlhought that if a graph could be constructed to obviate the necessity of so many calculations, it would simplify matters considerably and would also make the comparison of alternative designs an easy task. H. Bott