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This work covers briefly almost every branch of physiologic optics and is to some extent a condensation of much of the material found in larger works, e. g., Helmholtz' "Physiologic Optics," to which frequent reference is made. Unlike the latter, this book is up to date and incorporates the latest findings in the field of physiologic optics.
The book has, on the whole, the usual rigidly scientific presentation of facts and theory for which Southall is famous, though minor errors of fact are found here and there, largely relating to fine points of anatomy, pure physiology and practical ophthalmologic application. The style is often light and occasionally semipopular. This is probably due to the fact that the book is intended for a variety of readers, including "the large class of intelligent laymen," Incidentally, the latter, more than any one else, will be confused by the author's definition of