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I’m intrigued by the plastic drinking straw so if anybody is reading this elderly thread and knows could you explain? We don’t have dry ice but use a peltier cooled cloud chamber. I use a piece of thoriated welding rod as a source but I’m curious about the lo salt. I do have some for use as a demo with a GM tube but assumed it would just get wet and be a nightmare in a cloud chamber. Do you seal it in the plastic drinking straw?

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