Show OVERSEAS FLIGHT IN SIX HOURS AIR GOAL GOALBy By ay Associated Press prell NEW YORK Nov 1 18 Developments a.-Developments Developments in aeronautical science which may give to airplanes a speed of to miles I Ian an hour and permit crossing of ot the Atlantic in six or se Ie ven yen hours and a around round the world flight in almost a da day were predicted last night by Brigadier General William Mitchell chief of ot training and operations In the Amerlean Amei- Amei ican lean air service Speaking at a dinner of ot the American American Amerlean Amer Amer- ican lean Flying club the general announced announced announced an an- that among devices on which the engineering section was working were a a. carburetor attachment known as the turbo booster and a variable pitch propeller which together he said might produce the high speed he men men- Among other devices developed by the engineering section he said were a parachute which is la even more sure In Its actions than the ordinary life preserver at sea a landing gear that permits alighting on onate water ate 1 lc Ice or snow and a cannon which ma may be fired from an airplane |