Wichmann's book, originally in German, focuses on German and Austrian Art Nouveau, and takes as its theme the metamorphosis of scientific knowledge into the making of art. The chapter headings bear this out: ``the lamp as sculpture . . . the lamp as flower,'' ``geological and submarine motifs,'' ``aesthetics of the machine.'' The running text expands on this theme, while the long captions to the illustrations examine particular artists or ideas. The illustrations are profuse and very beautiful, and few objects, even those from the usual masters, are familiar from other texts: indeed, many come from private collections. Wichmann makes a clear case for the fusion of floral models with animal forms leading developmentally from Art Nouveau to Symbolism. An excellent and lovely book. Bouillon's book is more ambitious in scope and more pretentious in tone, attempting a coherent and exhaustive study of Art Nouveau: an analysis of its development over the time span noted and a synthesis of its variegated styles. The text is a bit arch at times, and some of the many illustrations all too familiar, but this in-depth study is a worthy successor to Robert Schmutzler's Art Nouveau (Abrams, 1978. rev. ed.) and even includes the German edition of Wichmann in its bibliography. Grace Anne A. DeCandido, ``School Library Journal''