A BRIEF account was given in NATURE of July 28, 1934, p. 132, of a projected American ascent into the stratosphere in the balloon Explorer, jointly organised by the National Geographic Society and the U.S. Army Air Corps. The following week it had to be recorded that the flight had failed, but that the pilot, Major W. E. Kepner, the observer, Capt. A. W. Stevens, and the alternate pilot, Capt. O. A. Anderson, had escaped by parachute from the falling balloon. Most of the valuable instruments were completely destroyed; but it would now appear that many of the records made on photographic strip have been saved.