The publication of this book marks the tercentenary of the revolution which swept King James VII and II off the thrones of Scotland and England and saw his sister Mary and her Dutch husband, William of Orange appointed co-monarchs in his stead.

The volume presents the results of a four-year inter-institutional, interdisciplinary research initiative led and organized by the National Gallery of Art. Contributions by 47 leading photograph conservators, scientists, and historians provide detailed examinations of the chemical, material, and aesthetic qualities of this important class of rare, beautiful, and technically complex photographs. The volume will help those who care for photograph collections gain a thorough appreciation of the technical and aesthetic characteristics of platinum and palladium prints and scientific basis for their preservation.