National Center for Preservation Technology and TrainingTechnology Serving the Future of America’s Heritage

www.ncptt.nps.gov/products© 2008 NCPTT

Protection of Metallic Monuments from Biodeterioration

Ralph MitchellSchool of Engineering and Applied Sciences

Harvard University

Image by Earl - What I Saw 2.0 on FlickrImage by Vicki & Chuck Rogers on Flickr