Until within a decade it could still be considered an open question whether the visual center was limited to a definite portion of the occipital lobe, and whether there existed a projection of the retinal quadrants on the corpus geniculatum and cortex. The affirmative of these two propositions, defended for forty years by Henschen1 and his followers, such as Wilbrand2 and Lenz,3 was for a long time vigorously attacked by the "decentralist" school, under the able leadership of von Monakow.4 But the experiments of Minkowski 5 in von Monakow's own laboratory appear to have reconciled the two schools, and the general conception of a definite anatomic projection of the retinal quadrants and the macular region on a sharply limited area of the occipital cortex is now generally admitted.
Another question, which has been often asked and answered in various ways, is: What is the localization of