A Report on a Decade of Progress"" carries on from where an earlier report to the nation left off- Medicine on the March (1949) -- and certainly some giant steps seem to have been taken: old people, by 1966, can look forward to an average age of 80; children now have much protection against polio; drugs offer the hope of a breakthrough against cancer- still the great unknown; and if the heart is the number one killer, still there are many new kinds of anticoagulants and surgical techniques available today. Mrs. Clark, the longstanding medicine editor of Newsweek, surveys and synthesizes what is being done, at the basic research level on up to the latest operative procedures. She is particularly interested in mental health and types of therapy (with the impossible case load of the psychiatrists today- a diminishing number); in aspects of child care and rearing (including the mentally retarded and the delinquent); in suicide-the 10th cause of death; as well as in the degenerative diseases or simply the nuisance ailments (acne, the common cold), etc. ... It's a capable, cheering progress report with all kinds of health information in which the lay reader usually shows a healthy interest.