_http://upstagereview.org/StagecraftArticles/fogsafe.pdf_ (http://upstagereview.org/StagecraftArticles/fogsafe.pdf) a web site describing safety issues relating to fog machines for theatrical use. _http://www.hse.gov.uk/pubns/etis3.htm_ (http://www.hse.gov.uk/pubns/etis3.htm) a web site with a safety data sheet re use of somke effects including fog machines Although both sites are concerned primarily with health effects on people, they contin useful warnings. I have NO practical experience with this material but the warning are enough to suggest that this should not be used in a museum. -- just an opinion Barbara Hass, retired librarian ========================================================= 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).