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Two errors occurred in the article by Dr. Alexander Duane entitled "Binocular Vision and Projection" (Arch. Ophth. 5:734 [May] 1931). On page 748, footnote 6, at the bottom of the page, should refer to the September, instead of to the April, 1919, issue of the American Journal of Ophthalmology. On page 751, eighteenth line, the last word should be seconds instead of inches.