How to Use a Medical Library

L.D.S., F.F.D.R.C S.I., and Norman Barrington Bray Symons, M.Sc., B.D.S., L.D.S. Fourth Edition. (Pp. 406; figs. 257. 50s.) Edinburgh and London: E. & S. Livingstone, 19.64. THE necessity for a fourth edition of this book within twelve years of its first publication tcstifies to its justifiable popularity and the authors have taken advantage of this new edition to bring the text completely up to date. An introductory chapter has been added to the section on the development and histology of the dental tissues to give the student, before getting immersed in details, a clear understanding of the basic structure of the elements composing these tissues and the chapter dealing with the relationship of structure and function has been considerably enlarged. Some twenty new illustrations have been added and the bibliography brought right up to date-many references being to work published only a few months before the book itself. This new edition strengthens the claim of the work to be a standard text for both under-graduate and post-graduate students. P. J. s.