1. Editorial

   • Biman Nath

   Department Pages: 1 - 2

2. Fritz Haber

   • Animesh Chakravorty

   Department Pages: 3 - 5

3. The Isoperimetric inequality

   • S Kesavan

   General Article Pages: 8 - 18

4. Drosophila stocks available for classroom studies

   Departments Pages: 18 - 18

5. How to count —An exposition of Polya’s theory of enumeration

   • Shriya Anand

   General Article Pages: 19 - 35

6. Cryptochromes and biological clocks

   • V. R. Bhagwat

   General Article Pages: 36 - 48

7. Lightning bugs

   • B. Gajendra Babu
   • M. Kannan

   General Article Pages: 49 - 55

8. Kaun banega crorepati —A million dollars for a mathematician

   • M. S. Raghunathan

   General Article Pages: 56 - 68

9. Haber process for ammonia synthesis

   • Jayant M. Modak

   General Article Pages: 69 - 77

10. Diffraction at a steel scale in the Reflection mode

    • A. W. Joshi
    • Umapati Pattar
    • F. I. Surve

    Departments Pages: 78 - 85

11. The synthesis of ammonia from its elements Nobel Lecture, June 2, 1920

    • Fritz Haber

    Classics Pages: 86 - 94

12. Refresher Course in Molecular Genetics

    Departments Pages: 97 - 97

13. Refresher Course on Physics of Earthquakes

    Departments Pages: 98 - 98

14. OnAmherstia nobilis

    • S. Krishnan

    Departments Pages: 99 - 100