Corrigendum to “Unique hues: an old problem for a new generation” [Vision Research 41 (2001) 1645–1657]

In the above article the reference to Hering, E. (1878/1964) should be (1920/1964). Leo M. Hurvich has kindly pointed out to the author that ‘Outlines of a Theory of the Light Sense’ (Cambridge, Harvard University Press, 1964, translated by Leo M. Hurvich and Dorothea Jameson), is based on Ewald Hering’s ‘Grundzuge der Lehre vom Lichtsinn’ (Berlin, Springer, 1920), and not, as has often been assumed, on ‘Zur Lehre vom Lichtsinne’ (Vienna, Gerolds Sohn, 1878).