I had one of these, and every time the aplha/beta source inside my cloud chamber emitted a particle, it nucleated a vivid streak of cloud along its track.
Don't tell me those AGWeenies are going to try to argue that CERN's results are bogus!
“I had one of these,”
I built a cloud chamber in the 9th grade. 1959. Plans were in Scientific Experimenter magazine. Got an A in Science Class.