The Perpetual Motion Mystery: A Continuing Quest by R.A. Ford. Lost Technology Series. Lindsay Publications, Inc. Published in 1987. Softcover book. 193 pages. Contents include: Perpetual Motion; Electrical & Mechanical analogies; Kinetic Gravitational Theories in 18th century; Mechanical Perpetual Motion and Newtonian mechanics; Descartes' Vortex Theory of Gravity; LeSage's Impact theory of gravity; natural gravitational anomalies; Brush's Wave Theory of Gravity; Newton's third law & Robert Cook's Intertial Propulsion Device; The Orffyrean Wheels; etc. Very scarce vintage book.
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