This book is the outcome of experiments in the examination of works of art under ultra-violet rays, conducted in the Museum in the late 1920s by James J. Rorimer. One of the first publications to provide an introduction to this method of accessing the condition and age of a work of art, Ultra-Violet Rays and Their Use in the Examination of Works of Art includes images of of several different objects in the Met's collection across cultures and media displayed under ultra-violet light.