Title: [Categories] galton.org [By Date] [By Journal] [By Category] Type:Journal:Year:Month:Day:Volume:Number:Pages:PDF FacsimileCategory:ID: [Back] 'The just-perceptible difference.' Proceedings of the Royal Institution Paper Author: Galton, Francis [Bib] Psychometry 1893 14 13-26 194 [Uncollected]