George Eastman House’s photostream on Flickr. Excellent historic images.
Short video about the Autochrome process, from The ImageWorks in Rochester, NY.
Concise History of Color Photography with excellent images and text.
The George Eastman House: Notes on Photographs: An international forum for gathering information that enhances the communal understanding of the photographic print.
History and manufacture of Lantern Slides.
The scandal and possible truth surrounding Levi Hill who claimed to have invented color photography.