Black and white photographic print, taken with a deep expansion chamber, showing the tracks of fast beta-rays from radium E
Black and white photographic print, taken with a deep expansion chamber, showing cosmic-ray tracks in oxygen
Five black and white photographic prints showing the tracks of fast beta-rays from radium E, by Dr. E.J Williams at the Dept. of Physics, University College of Wales, Swansea, Wales, 1935-1937 Five black and white photographic prints showing the tracks of fast beta-rays from radium E