Toroidal vortex rings
Toroidal vortex rings is a scholarly work, published in 1983 in ''American Journal of Psychiatry''. The main subjects of the publication include trajectory, Drop, classical mechanics, vortex, instability, vortex ring, fluid dynamics, mechanics, toroid, optics, and physics. Apart from obtaining a more complete picture of the ring generation mechanism and the nature of the ring trajectory a new axial instability has been found.