1. Editorial

   EditorialNotes 30 August 2009 Pages: 311 - 311

2. Walter Sutton and the chromosome theory of heredity

   • S. Mahadevan

   Article-in-a-Box 30 August 2009 Pages: 312 - 315

3. Snippets of physics

   • T. Padmanabhan

   Series / Article 30 August 2009 Pages: 318 - 327

4. Aerobasics — An introduction to aeronautics

   • S. P. Govinda Raju

   Series / Article 30 August 2009 Pages: 328 - 345

5. Molecule matters van der Waals molecules

   • E. Arunan

   Feature / Article 30 August 2009 Pages: 346 - 356

6. The simple pendulum: Not so simple after all!

   • H. P. Kaumudi
   • Vasant Natarajan

   Classroom 30 August 2009 Pages: 357 - 366

7. Algorithms as machines

   • Kamal Lodaya

   Classroom 30 August 2009 Pages: 367 - 379

8. Perfect Medians, Euler, and Ramanujan

   • A. K. Mallik

   Classroom 30 August 2009 Pages: 380 - 383

9. Think it over

   • K. B. Athreya

   OriginalPaper 30 August 2009 Pages: 384 - 385

10. The scientific enterprise

    • V. V. Raman

    Reflections 30 August 2009 Pages: 386 - 397

11. On the morphology of the chromosome group in Brachystola magna

    • Walter S. Sutton

    Classics 30 August 2009 Pages: 398 - 411

12. The origin of species after 150 years’

    • Vidyanand Nanjundiah

    Erratum 30 August 2009 Pages: 412 - 412