One of the important dental publications in 1938, this book is of special value and interest to both the dental and the medical profession. It is concerned with fundamental, basic and scientific principles of dental practice rather than with technical details. For the dentist it should strengthen and clarify the scientific basis of his procedure and for the physician it will clear up many traditional errors. There are twentytwo chapters, supplied by nineteen authors, the editor, Dr. Gordon, contributing the eleventh chapter, on calcium and phosphorus compounds in relation to dental nutrition. Each chapter is an independent treatise, but all are so admirably selected and so integrated by cross references that the book constitutes a unit.
The first and second chapters, on tooth development and experimental dental histophysiology, by Isaac Schour, deal with the calcification pattern of the teeth, which, like the developmental rings of the tree, records the experiences