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After two years this popular manual now appears in a new edition. It has been carefully revised, some of the text has been rewritten and new illustrations, both in color and in black and white, have been added without increasing the size of the book. Of particular importance is the appendix giving the ocular requirements for admission to the Army, Navy and Marine and Air Corps of the United States.
The author and his capable assistant, Dr. Charles A. Perera, have admirably succeeded in bringing the contents of this book up to date, thus insuring the continuation of its just popularity.