>I would *not* advise to do such experiments in rural areas. Why not in rural areas? Nobody around to see you glow... Has anybody tried nuclear sources, though? I mean, this part of the country is known for uranium and radium deposits, so ... Andy ================================================================== Andy Kunz - Montana Design - 409 S 6th St - Phillipsburg, NJ 08865 Hardware & Software for Industry & R/C Hobbies "Go fast, turn right, and keep the wet side down!" ==================================================================