A meeting of the Royal Aeronautical Society was held in the Library of the Society at 4 Hamilton Place, London, W.l, on Tuesday 25th September 1945, at which M. L. Malavard, of the Laboratoire des Analogies Electriques, Paris, lectured on “The Use of Rheo-electrical Analogies for the solution of Aerodynamical Problems.” In the chair, Mr. E. F. Relf, C.B.E, F.R.S., F.R.Ae.S. (at that time Superintendent of the Aeronautics Division, National Physical Laboratory).