As he guides readers through the surprising depth of canine emotional complexity, Jeffrey Masson draws from myth and literature, from scientific studies, and from the stories and observations of dog trainers and dog lovers around the world. But the stars of the book are Masson's own three dogs - Sasha, Sima, and Rani - whose delightful and mysterious behavior provides the way to exploring a wide range of subjects - from emotions like gratitude, compassion, loneliness, and disappointment to speculating what dogs dream of, how they perceive of other species (including humans), and how their powerful sense of smell shapes their perception of reality. As he sweeps aside old prejudices on animal behavior, Masson navigates through the rich universe of dog feeling to its essential core, their master emotion: love.

A family of dedicated birders presents an illustrated tribute to birds featuring a combination of scientific facts, folklore, poems, and songs.--

A number of years ago I began a project to derme and evaluate the impact of Buffon's Histoire naturelle on the science of the late eighteenth and early nineteenth centuries. My attention, however, was soon diverted by the striking difference between the highly literary natural history of Buffon and the duller, but more rigor ous, zoology of his successors, and I began to try to understand this transformation of natural history into a set of separate scientific disciplines (geology, botany, ornithology, entomology, ichthyology, etc. ). Historical literature on the emergence of the biological sciences in the early nineteenth century is, unfortunately, scant. ! Indeed the entire issue of the emergence of scientific disciplines in general is poorly documented. A recent collection of articles on the subject One reason for this is, of course, that scientific development is a highly com plex process. Consequently, there has been a tendency for those engaged in its empirical study to select for close attention one strand or a small number of strands from the complicated web of social and intellectual factors at work. Many historians, for example, have dealt primarily with the internal development of scientific knowledge within given fields of inquiry. Sociologists, in contrast, have tended to concentrate on the social processes associated with the activities of scientists; but at the same time 2 they have largely ignored the intellectual content of science.

It is remarkable that each month the quantity ofarticles published on AIDS still that address numbers in the thousands. The basic, clinical and sociological aspects this epidemic have been vigorously investigated, and equally as extensively reported in traditional as well as new journals. Therefore, what can the reader ofthis volume expect to find that is different from the information already found in the literature? The authors of this text met in October 1993 to discuss not only AIDS and its effects on the nervous system but also to address the problem from the point of view of the diverse technologies that are used in understanding the disease. Just as the recog nition ofoncogenic viruses gave us insights into cellular genes that govern growth, the study ofHIV-I in the nervous system has opened new areas ofinvestigation in the nervous system. Use of human fetal and glioma-derived cell cultures, discovery of toxins in the nervous system, release and damage of cytokines in the brain, the neuropathic effects of HIV proteins, the investigation of new treatment for neuro AIDS, and virus detection strategies to identify latent HIVI infection are described in this volume. Basic and clinical investigators from more than thirty laboratories around the world contributed to the ideas discussed at the meeting, "Technical Advances in AIDS Research in the Human Nervous System.