I wrote: On occasion I've looked for the Piantelli anecdote, which I read somewhere, > but I haven't succeeded yet in tracking it down. >
Apparently I didn't look too far. There are several references to his using a cloud chamber. Here is a brief description from Steven Krivit (search for "cloud chamber") [1]. If someone knows of a more complete description, I'd be grateful for a reference; I recall a story outlining someone's visit to Piantelli that I read several years ago. For the curious, here is a video of a cloud chamber at work, where you can see alpha and beta decays from normal background radiation, as well as alpha decays from Americium and then Radon [2]. Eric [1] http://newenergytimes.com/v2/news/2008/NET29-8dd54geg.shtml [2] https://www.youtube.com/watch?v=Efgy1bV2aQo
