classic papers of the week -- 79

Experimental Test Of Parity Conservation In Beta Decay

• C.S. Wu (Columbia University, New York, New York) , E. Ambler, R.W. Hayward, D.D. Hoppes, R.P. Hudson (National Bureau of Standards, Washington, D. C.)

Nebulae

• Slipher, V. M.

Interaction of "Solitons" in a Collisionless Plasma and the Recurrence of Initial States

• Zabusky, N. J. (Bell Telephone Laboratories, Whippany, New Jersey); Kruskal, M. D. (Princeton University Plasma Physics Laboratory, Princeton, New Jersey)