Types of Congenital Symbol Amblyopia.

W. Pringle Morgan,¹of Seaford, Sussex, England, was the first to point out that, in addition to the word-blindness which is the result of acquired cerebral lesion, there is a word-blindness congenital in nature which he has suggested is due to defective development of the word memory centers of the cerebral cortex. This communication was followed by those of Hinshelwood²and Nettleship,³Wernicke,⁴of Buenos Ayres, and others⁵the experience of all who have observed and studied these cases simply justifies the initial and simple conclusions of Morgan. The first American observer who has recorded any observations on this subject is A. Schapringer, of New York, who read a paper on the subject before the Section of Ophthalmology of the New York Academy of Medicine, Feb. 19, 1906. His paper on that occasion was followed by one by myself in which I referred to two