| Description | Photocopied articles, comprising "The Correction of Low Intensity Luminance Functions for the Purkinje Effect" by C S Bridgman, in 'Journal of the Optical Society of America', vol. 42, number 11, (November 1952); and "Foveal Light Adaptation as Affected by the Spectral Composition of the Test and Adapting Stimuli" by William R Bush, in 'Journal of the Optical Society of America', vol. 45, number 12, (December 1955). |