Black and white photographic print showing a disintegration produced in a lead plate by cosmic rays 1935-1937
Early stereoscopic pair of cloud-track photographs, (1913-1914), illustrating electrons ejected by a narrow beam of X-rays 1913-1937
Stereoscopic pair of cloud-track photographs showing the passage of an X-ray beam through a copper target 1937-1948
Black and white cloud track photographic print, showing the artificial disintegration of lithium by high-speed protons 1933-1937
Black and white photographic print showing a cosmic ray negative electron of 1300 million volts energy 1935-1937
Black and white photographic print, showing the straggling of ranges of alpha rays from thorium C1 1933-1937
Production of a positive electron by absorption of the radiations from berylium bombarded by alpha-rays from polonium 1927-1937
Photogaphic print and diagram, showing showing secondary beta-rays ejected from air and from a copper screen by X-rays 1920-1930
Black and white photographic print, showing a nuclear explosion due to cosmic rays, yielding three highly-ionising particles together with an electron 1936
Black and white photographic print, diagram and display label, showing the production of electron pairs in krypton gas 1936-1937
Stereoscopic pair of photographs showing two 'straight' cosmic-ray tracks on a single pair of photographs 1930-1937
Diagram of Joseph John Thomson's method of measuring electromagnet for thermo-electrons (1899) 1945-1948
Black and white photographic print, stereoscopic pair of cloud-track photographs showing tracks of electrons 1937-1948
Black and white photographic print, showing the track of a proton projected by a neutron from beryllium bombarded by alpha-rays from polonium, in a magnetic field of 8000 gauss 1933-1937
Photogaphic print and diagram, showing secondary beta-ray ejected from copper by X-rays together with a secondary beta-ray due to copper K-radiation 1920-1930
Black and white photographic print, showing the production of a pair of electrons, positive and negative 1934-1937
Print mounted on card, showing the emission of beta-rays from radio silicon, together with a few positrons from radio-nitrogen, present as an impurity 1930-1937
Two photogaphic prints, showing the collision of an alpha-ray with an oxygen atom in an argon-filled expansion chamber 1922
Black and white photographic print, from a negative by Pierre Auger, Paris, France, showing a compound photo-electric effect in neon 1933-1937