THE CHAIRMAN Ladies and Gentlemen, before calling on Dr Thurston to read hispaper, I will read a few letters that I have received from persons connectedwith aeronautics, expressing regret at not being able to attend here thisevening

(Letters were read from Colonel Moore-Brabazon, Mr Hart Sanders, Mr Richards, MrMelville Jones, General Brooke-Popham, General Cadman Vickers, Captain deHavilland, Mr Chadwick, Mr Bruce and Captain F M Green )

Now, Ladies and Gentlemen, as Dr Thurston is so well known in the Aeronauticalworld it is hardly necessary to say anything by way of introduction, but onlyask him to read his paper