In this space, visitors are invited to post any comments, questions, or skeptical observations about Philo T. Farnsworth's contributions to the field of Nuclear Fusion research.Subject: Re: Not very active
Date: Mar 31, 07:50 am
Poster: Stephen ColeyOn Mar 31, 07:50 am, Stephen Coley wrote:
Concrete, because of its limestone content is a very common source of background radiation, limestone is, after all the source of radon. It would be interesting to know if someone might have a list of common local background radiation sources.