> > I wonder if it would be classed as "reasonably safe" now. We have an > Fe55 source here for checking out some detectors, and it gets the "full > treatment" in terms of notices on the lab door, restricted access, locked > away in a safe, people wearing radiation badges etc etc etc, despite being > apparently "reasonably safe". A tablespon of "Diet salt" poured around a geiger tube will give you a cryptographically random output. (random meaning unpredictable) A good fraction of the potassium in the salt is radioactive. If it's meant for people to EAT, then one would imagine that it meets any practical definition of "safe". -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist