It is now over a year since the Society had the pleasure of listening to Senor de la Cierva’s paper on the development of his new type of aircraft. In view of that paper it is unnecessary for me to enter into any detailed historical account, but I would like to recall to your minds just these few facts. The object which Senor de la Cierva had in view was to design some form of aircraft which would avoid loss of control on stalling and would at the same time facilitate the process of landing.