This classic book on anti-gravity and free energy is back in print. Written by a well-known American scientist under the pseudonym of Rho Sigma, this book delves into international efforts at gravity control and discoid craft propulsion. Before the quantum field, there was 'ether'. Includes chapters on John Searle and Searle discs; T Townsend Brown and his work on anti-gravity; ether-vortex-turbines plus a Foreword by former NASA astronaut Edgar Mitchell.