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The long anticipated fourth volume of the "Text-Book of Ophthalmology" by Sir Stewart Duke-Elder has at last appeared with an apology for keeping us waiting because the author was for six years concerned with "matters outside the library." This volume is well worth the wait. It continues the now almost legendary influence the three previous volumes have had on ophthalmology in the English-speaking world.
If one reflects back to the period prior to the publication of volume I of this monumental work, it will be recalled that no ophthalmologist could be really well informed who did not have a reading knowledge of at least German and French. In order to cover the literature on any ophthalmologic subject, either in the basic sciences or in clinical subjects, one had to read the material in the original publication, and it was a most lamentable fact that this was seldom in the English