THE PRESIDENT (Dr. Oscar Faber, O.B.E., M.Inst.C.E.) proposed a hearty vote of thanks to Dr. Evans for his magnificent paper. It contained, he said, a wealth of material, which might be dealt with adequately if it were spread over six lectures and if about twenty meetings were devoted to its discussion. Mr. GOWER B.R. Pimm, M.Inst.C.E. (Member of Council), endorsed the President’s tribute to the excellence of the paper, but admitted that considerable study was necessary in order to digest its contents.