ARRANGEMENTS are being made by the Royal Aeronautical Society to resume part of the lecture programme which was postponed on the outbreak of war. It is hoped to arrange definitely for four or five lectures. The first one, on aircraft production, will be given by Mr. H. J. Pollard, on March 12 at 6.0 p.m., in the Institution of Electrical Engineers. Sir Alan Cobham and Mr. Marcus Langley have provisionally agreed to give a joint lecture on flight refuelling in the air; Mr. A. A. Hall on recent theoretical and experimental work on turbulence; Wing Commander T. R. Cave-Brown-Cave on noise and nuisance in aircraft, at dates to be fixed. The Wilbur Wright Lecture will be delivered at the end of May.