"Barlow [Horace B]" Contains extracted pages from journals and photocopies of articles, some annotated by Smith, comprising: "The Role of Afterimages in Dark Adaptation" by H B Barlow and J M B Sparrock, in 'Science', vol. 144, (12 June 1964); "Dark Adaptation: A New Hypothesis", in 'Vision Research.', vol. 4, (1964); "Change of Organization in the Receptive Fields of the Cat's Retina During Dark Adaptation" by H B Barlow, R Fitzhugh, and S W Kuffler, in 'Journal of Physiology', vol. 137, (1957); "Temporal and Spatial Summation in Human Vision at Different Background Intensities" by Barlow, in 'Journal of Physiology', vol. 141, (1958); "Cell Guidance by Alterations in Monomolecular Films" by H B Barlow and R M Hill, in 'Science', vol. 139, 1 February 1963. 1958-1964