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To the Editor.
—Doctor David Cogan was kind enough to call my attention to an article by Doctor M. G. Meur, "Etude des sommations spatiales rétiniennes dans les amblyopies fonctionelles," published in the Bulletin de la Société Belge d' Ophthalmologie (138:377-383, 1964). Doctor Meur's results in studying the spatial summation in a group of amblyopes were very similar to mine.In searching the literature on the subject of spatial summation, I simply failed to discover his article. I freely admit Doctor Meur's priority in making these observations and have informed him of this by letter.Please accept my apologies to you and the readers of the Archives for this oversight.