The Natural Classroom:  A Directory of Field Courses, Programs, and Expeditions in the Natural Sciences       by Jack R. Edelman, Ph.D. This valuable directory lists nearly 200 institutions offering courses, expeditions, and workshops in the natural sciences. Information on institution, courses and credit offered, living arrangements, costs, and facilities is provided for each listing. ISBN 1-55591-923-5   Middle and high school, college, libraries 6 x 9, 288 pages $32.50    hardcover Jack Edelman, a Biology teacher in the New York City Schools, has put together a valuable listing of opportunities for those who wish to learn by observing and doing in the field. This book lists hundreds of field courses, safaris, expeditions, eco-tours, and other educational opportunities for teachers and students. For those, like Dr. Edelman and myself, who know that studies in the field add extra dimensions to one´s knowledge and learning, this book will provide opportunities to expand their experiences; for those who have not had this chance, the book will encourage them to take a course or join an expedition. Harold Stonehouse The Earth Scientist

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