Captain William de Wiveleslie Abney, English chemist, c 1900.
© NMeM / Royal Photographic Society / Science & Society Picture Library
Portrait of Abney when president of the Camera Club. Sir William de Wiveleslie Abney (1843-1920) pioneered photography of the solar spectrum, and carried out research into photographic chemistry and colour photography. He was president of the Physical Society (1895-97) and adviser to the board of education (1903).