Professor W.D. (David) Wright who was appointed to the Chair in Applied Optics. Wright's speciality was in colour science and colour vision, an area of research that had been investigated as early as 1877 by Sir William Abney at the South Kensington campus. Under Wright's leadership, the section flourished, benefiting from the general expansion of the College and in particular from the rapid growth of the Physics Department under the vision and leadership of P.M.S. Blackett.