1. The preferred null symmetries of a null electromagnetic field interacting with a null free gravitational field

   • L. Radhakrishna
   • S. P. Gumaste

   OriginalPaper Pages: 395 - 406

2. Inadequacy of hydrodynamical theories of the Aharonov-Bohm effect

   • A. Joseph Zuchelli

   OriginalPaper Pages: 407 - 415

3. Infinite conductivity and perfect diamagnetism in type-I superconductors

   • G. Papini

   OriginalPaper Pages: 417 - 423

4. Segal's mechanism for the red shift and its physical bases

   • Jan Tarski

   OriginalPaper Pages: 425 - 439

5. Application of Schiff's rotating-frame electrodynamics

   • Ø. Grøn

   OriginalPaper Pages: 441 - 448

6. Sigma model for Ernst equation: Lax representation, Bäcklund transformation and divergence-free currents

   • E. V. Doktorov
   • A. N. Tarakanov

   OriginalPaper Pages: 449 - 459

7. Conserved quantities, invariant forms, and dynamical symmetries

   • Giacomo Caviglia

   OriginalPaper Pages: 461 - 467

8. Particle production by charges in condensed matter

   • Miroslav Pardy

   OriginalPaper Pages: 469 - 474

9. Canonical quantization of 1+1 dimensional gravity

   • Tom Banks
   • Leonard Susskind

   OriginalPaper Pages: 475 - 496

10. Reflections on quantum logic

    • B. Z. Moroz

    Erratum Pages: 497 - 498