National Geographic : 1933 Aug
© London Times MEN MUST BREATHE, IN ALTITUDE FLYING AS IN DIVING Difficulty of carrying enough oxygen was a major factor in defeating attempts to climb Everest. The function of the airplanes was the carrying of the air as well as the men, and also the cameras, which brought back panoramas and data no earth-bound explorers could have obtained. Here Air Commodore Fellowes is fitting Colonel Blacker with altitude equipment. ©London Times PREPARING TO PEER INTO SECRET PLACES OFTHE MOUNTAINS A major scientific objectofthe Expedition was tophotograph the con formation of inaccessible southern declivities ofthemassif outofreach of any climbing party. For this purpose oblique pictures were taken with hand cameras. The other objective was totake strip pictures with vertical cameras which would help map thelofty area (seeillustration, page 142).