This work emerged from his 1949 dissertation (Theory of Infra-Red Sensitivities and Its Application to Investigations of Stellar Radiation in the Near Infra-Red) while at the University of Cambridge.
Er fand diesen in seiner Dissertation 1949 (Theory of Infra-Red Sensitivities and its Application to Investigations of Stellar Radiation in the Near Infra-Red) über Infrarotspektroskopie an der Universität Cambridge.