Arthur Beiser, a native of New York City, received B.S., M.S., and Ph.D. degrees in physics from New York University, where he later served as Associate Professor of Physics. He then was a Senior Research Scientist at the Lamont Geo- logical Observatory of Columbia University. His research interests were chiefly in cosmic rays and in magnetohydrodynamics as applied to geophysics and astrophys- ics. In addition to theoretical work, he participated in a cosmic-ray expedition to an Alaskan peak and directed a search for magnetohydrodynamic waves from space in various Pacific locations. A Fellow of The Explorers Club, Dr. Beiser was the first chairman of its Committee on Space Exploration. He… is the author or coauthor of 36 books, mostly college texts on physics and mathematics, 14 of which have been translated into a total of 27 languages. Two of his books are on sailing, The Proper Yacht and The Sailor's World. Figure 13-21 is a photograph of Dr. Beiser at the helm of his 58-ft sloop; he and his wife Germaine have sailed over 150,000 miles, includ- ing two Atlantic crossings and a rounding of Cape Horn. Germaine Beiser, who has degrees in physics from the Massachusetts Institute of Technology and New York University, is the author or coauthor of seven books on various aspects of physics and has contributed to The Physical Universe. For a number of years she was the editor of a cruising guide to the Adriatic Sea.