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led to consequences unforeseen by the original inventors and discoverers. Many of the underlying concepts and interpretations of the phenomena (and even the photographs themselves ) have become incorporated into culture at large, into language, the arts, the unconscious. As unvoiced assumptions, as raw material for art and advertising, the images and concepts can influence how we see ourselves, the biosphere, the physical universe-how we choose to use social and physical resources, tools and time. The photographs do not celebrate the progress of technology per se, nor are they self-referential celebrations of technological visualization. Rather, their focus is on humanity's changing visualization of the sciences and of nature , curiosity and continually unfolding models. Diversity of life on earth is illustrated, as is planetary science and cosmology and particle physics. The 1919 eclipse expedition to test Einstein's theory ofgeneral relativity is a prime example. The frontiers of understanding and the birth of new concepts are emphasized. Applications are well represented in Beyond Vision. The Landsat photos of earth resources and satellite photos ofweather patterns have come to be taken for granted. The photos of the discovery of hydrothermal vents (with their previously unknown submarine animal communities) have led to knowledge of new biological energy pathways and new ideas on the evolution of early life. The quality of the photos is outstanding and the book contains many fine examples of photographic display for its own sake-as well as for clarity of exposition--especially in the sequences and arrays of multiple frames. While not a 'coffee table book', this volume can be appreciated quite well for the photos and titles. The captions also provide information on apparatus used, settings, locations and film speeds. The photographers and authors are listed, and references-often several-are provided. Primary references are common . The essays provide historical and anecdotal information, scientific context, explanations or interpretations of image details and their significance , and often-at least inter aliasome social context ofthe experiments. The images span 1842 to 1982most of the 150 years of photography. 242 Current Literature Since the 1960s (at the latest) the number of available frames and the recording technologies have made selection and processing necessary. The need for accurate interpretation increases as communications accelerate . In his prefatory essay covering a brief history of scientific imaging, Darius points out the importance of the interpretation of images "so that the scientist can achieve insight". The book's rigid format (one page of text plus one page of photos equals one item) is somewhat reminiscent of a collection of topical columns. Occasionally, there seems to be a tendency to state theories and hypotheses as explanations or facts. The photographs augment this; photographs have a reputation for being 'true', 'objective' or 'factual'. Darius does provide a caveat in his introductory essay: he urges the reader to view the images produced by three methods, each of which demonstrates some aspects of atomic structures. The excellence of the photos and their subjects should guarantee that the collection will not become dated; indeed, many of the early photos are themselves museum pieces. One might wish for a similar book of newer images. However, there is no shortage of new images for readers or viewers: the mass media distribute images with minimal delays. Yet time, hard work and insight are essential for effectively communicating discoveries as well as for making them. Beyond Vision is a collection of classic photographs and clear essays, a good volume to start with if one wishes to find a famous photograph or details of a first observation, a fine book for browsing or for reading from cover to cover. MIND CHILDREN: THE FUTURE OF ROBOT AND HUMAN INTELLIGENCE by Hans Moravec. Harvard Univ. Press, Cambridge, MA, U.S.A., 1988. 214 pp. Paper, $8.95. ISBN: 0-674-57618-7. Reviewed Uy Fred Truck, 4225 University, Des Moines, lA, 50311 U.S.A. Hans Moravec is director of the Mobile Robot Laboratory of CarnegieMellon University. His book, Mind Children: The Future ofRobot and Human Intelligence, begins with a survey of the brief history and current state of robotics. This survey breaks down into the two basic schools of thought concerning the development of machine...

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