After World War II, Professor S.K. Mitra wrote a comprehensive book called The Upper Atmosphere, which dealt with information available from ground-based and balloon-borne experiments. As a result, topics such as day airglow were investigated and further ground-based experiments using incoherent back-scattering were carried out. These activities resulted in new information on the ozonosphere.

The dramatic discovery of ozone holes forms a new and exciting chapter in the discovery of atmospheric processes. While dealing with the limits of the atmosphere, reference may be made to...