This is the third edition of the Year Book of Physical Therapy. Although it is the newest of the series of year books, this yearly volume on physical therapy has amply proved its value. As in previous years, the book has been edited by Dr. Richard Kovács, whose wide experience and knowledge of many languages admirably suit him for the work of compiling the available yearly information on the subject of physical therapy. The fortieth anniversary of the Year Book series is now being celebrated, and the editor in recognition of this fact has inserted an introductory article on the treatment and management of arthritis. Throughout the text, from this introductory article to the final section on applied physical therapy, there will be found much valuable material of interest not only to the specialists in physical therapy but also to the general practitioner and to specialists in many other fields.