Links to related information on other sites:

Volcano World -- The Premier Source of Volcano Info on the Web
http://www.volcanoworld.org/

Volcanoe Pictures Home Page
http://www.sjordi.com/pictures/welcome.html

Volcanic Ash: Cleaning Museum Objects (Conserve-O-Gram 3/5)- (An Adobe PDF file)
http://www.cr.nps.gov/museum/publications/ conserveogram/03-05.pdf

Michigan Technological University Volcanoes Page
http://www.geo.mtu.edu/volcanoes/