front cover

 

Human chromosomes revealed by spectral karyotyping.
(Credit: Dr Thomas Ried, NCI/NIH)



back cover Walter S Sutton
(1877–1916)
( Illustration: Subhankar Biswas )

 

April 2009  Volume 14 Number 4 Contents

EDITORIAL
311
--- S Mahadevan
ARTICLE IN A BOX
312
SERIES ARTICLE
318

Snippets of Physics

Lagrange has (more than) a Point!

--- T Padmanabhan

328

Aerobasics – An Introduction to Aeronautics

The Airplane Configuration

--- S P Govinda Raju

FEATURE ARTICLE
346

Molecule Matters – van der Waals Molecules

History and Some Perspectives on Intermolecular Forces

--- E Arunan

CLASSROOM
357

The Simple Pendulum: Not So Simple After All!

--- H P Kaumudi and Vasant Natarajan

367

Algorithms as Machines

--- Kamal Lodaya

380
THINK IT OVER
384
REFLECTIONS
386

The Scientific Enterprise

The Methods in Science

--- V V Raman

CLASSICS
398
412

Erratum

--- Vidyanand Nanjundiah


Flowering Trees
--- (Credits: K Shankar Rao,CES, IISc, Bangalore)