Central Park extends over 840 acres. Twelve million people wander through it yearly, ""making it the most heavily frequented park of its size in the world."" ""The first and most influential of American landscaped parks,"" it was planned in 1858 by Olmstead and Vaux. ""Every foot of the park's surface, every tree and bush, as well as every arch, roadway and walk has been fixed where it is with a purpose,"" Mr. Olmstead stated firmly. The planners thought of it as a scenic tranquilizer; today it is a sports arena, movie set, theatre and concert setting. Mr. Reed, Curator of the Park, and Miss Duckworth provide walking tours, designating points of interest and offering information down to the approximate dates of leafing and budding and blossoming of plants, for those who still wish to use the park in the original sense. For others there are lists of recreation available, a calendar of events, comparative statistics about world parks, further reading suggestions. Hon. Thomas P. F. Hoving, Commissioner, Department of Parks, City of New York, introduces the book. A bit of a literary tranquilizer itself, but it will have an honored place in New York lore for its informational value.