The Torus of Time used by Al Bielek in his presentations to describe the time theory that was being used by the military in the Philadelphia and Montauk Projects. From the book, "How You Can Explore Higher Dimensions of Space and Time" by T.B. Pawlicki (1984) ISBN 0-13-444035-8 The center of the torus described as the 4th dimension, an even flow or straight line, created by the spin of the 5th dimensional vector (the outer circumference), which takes 40 years to complete a turn.