The 20th century is regarded by many as the Age of the Flowering of Science. This collection of twenty current articles from the Annual Reports is proof that the Smithsonian Institution is contributing its share of scientific blooms. The slant here is towards the lay reader and some of the names are fairly big. George W. Beadle, for example, discusses ""The Place of Genetics in Modern Biology"" and Karl G. Compton surveys ""The Intellectual and Social Significance of the Electron."" The topics vary widely, ranging from cybernetics to Carbon 14, ultrasonics to stellar navigation. This is a satisfactory symposium, but it does not measure up to The New Treasury of Science (p. 881, 1965) for comprehensiveness and verve.