1. C. S. Gardner, H. Goertzel, H. Grad, C. S. Morawetz, M. H. Rose andH. Rubin:Hydromagnetic Shock Waves in High Temperature Plasmas, NYO-2538, Inst. Math. Sci., N.Y.U., January 30, 1959.
2. C. S. Morawetz:Magneto-Hydrodynamic Shock Structure Using Friction, NYO-8677, Inst. Math. Sci., N.Y.U., January 12, 1959.
3. J. H. Adlam andJ. E. Allen:Phil. Mag.,3, 448 (1958).
4. L. Davis, R. Lüst andA. Schlüter:Zeits. f. Naturf.,13 a, 916 (1958).
5. For the derivation of the equations in general form see, for example,H. Grad:Notes on Magneto-Hydrodynamics. I.General Fluid Equations, NYO-6486, Inst. Math. Sci., N.Y.U., August 1, 1956.