The 1951 Year Book continues the tradition of previous volumes in presenting the best of current literature in abstract form. The editors' comments interpret the application of the abstracted information and pediatric practice. Introductory editorials head specific chapters, providing information regarding latest developments, trends, summaries, reorientation, and critical comments. The editorial policy makes the book far more than a compendium of current abstracts; it becomes an intructive discriminating seminar. The practicing pediatrician should not be without this book.