This third edition of Dr. Black's monograph on fluid balance follows the pattern set in earlier editions, being brief without sacrificing either good prose or essential content. Brevity is achieved in part by scrupulously avoiding unnecessary repetition of material in the various sections of the book. More important for the general medical reader, for whom the book is intended, the content has been carefully selected to include only as much detail as is deemed necessary for a broad coverage of the subject. For those who would like a more detailed coverage the author refers to good and extensive review articles, many of which he has clearly marked in the bibliography.
The book is simple in format, being divided into four major chapters: "Water," "Sodium," "Potassium," and "Hydrion ( Acid-Base)." Each topic is discussed from the standpoint of control mechanisms, disorders resulting in improper control, and clinical manifestations of aberration in these