As a note of general information, the ultimate authority on museum fire protection is probably the National Fire Protection Association's (NFPA) publication NFPA 911: _Protection of Museums and Museum Collections 1991_. This is also an ANSI standard. NFPA has a WEB Home Page - http://www.wpi.edu/Acade.../Nfpa_home.html It is said there that they may be contacted at [log in to unmask] Their address is 1 Batterymarch Park, Quincy, MA 02269-9101, (617) 770-3000, FAX (617) 770-0700 I hope this will cure my previous vagueness on this matter. Henry Grunder Conservation/Preservation Coordinator Library of Virginia