1. Letters to the editors

   • Ian Stewart

   Department Pages: 62 - 62

2. Editorial

   • B. Teissier
   • E. Hölder

   Department Pages: 63 - 64

3. Is the solar system stable?

   • Jürgen Moser

   Article Pages: 65 - 71

4. Colouring problems

   • W. T. Tutte

   Article Pages: 72 - 75

5. Teaching and research: A false dichotomy

   • P. J. Hilton

   Dialogue Pages: 76 - 80

6. Riemann’s example of a continuous “nondifferentiable” function continued

   • S. L. Segal

   Dialogue Pages: 81 - 82

7. Obituary

   • Lipman Bers

   Department Pages: 83 - 83

8. Maximum antichains in the partition lattice

   • R. L. Graham

   Feature Pages: 84 - 86

9. News

   Department Pages: 87 - 87

10. New and noteworthy

    Department Pages: 88 - 89

11. The kalman filter

    • A. V. Balakrishnan

    Article Pages: 90 - 92

12. The Birkhoff prize talks Atlanta, 1978

    • Garrett Birkhoff

    Feature Pages: 93 - 101

13. Archimedes’ lost treatise on the centers of gravity of solids

    • W. Knorr

    Article Pages: 102 - 109

14. Puzzles

    • R. M. Smullyan

    The Old Intelligencer Pages: 110 - 111

15. The mathematician’s art of work

    • J. E. Littlewood

    The Old Intelligencer Pages: 112 - 119

16. Solutions to puzzles by smullyan

    The Old Intelligencer Pages: 119 - 120

17. Solution to the problem in number 1, p. 58

    The Old Intelligencer Pages: 120 - 121