In addition to the good advice by Dave Harvey, you might try investigating whether either Joseph Vincelli or Wayne Wood are still at the McGill University Environmental Safety Office. They gave a very good talk at the SPNHC 2002 meeting on Contaminated Collections about their work with radioactive mineral materials in the McGill Redpath Museum. They might have useful information for you as well. Best, Rachael Perkins Arenstein Conservator in Private Practice, NY _________________________________________________________________ Messenger Café — open for fun 24/7. Hot games, cool activities served daily. Visit now. http://cafemessenger.com?ocid=TXT_TAGHM_AugHMtagline ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).