1. Studies in blue perchromic acid

   • Satya Prakash
   • Ram Chandra Rai

   OriginalPaper Pages: 1 - 7

2. Spectral and collision data of CO⁺ and the dissociation energy of carbon monoxide

   • R. K. Asundi

   BriefCommunication Pages: 8 - 10

3. Some integrals involving Humbert function

   • B. R. Pasricha

   OriginalPaper Pages: 11 - 19

4. Dynamics of thunderstorms

   • S. L. Malurkar

   OriginalPaper Pages: 20 - 27

5. The action of grignard reagents on benzopyrones

   • A. R. Sukumaran Kartha
   • K. N. Menon

   OriginalPaper Pages: 28 - 30

6. Opacity changes in gel-forming mixtures during setting

   • T. V. Desai
   • S. Guruswamy

   OriginalPaper Pages: 31 - 39

7. Excitation processes in the night sky and the aurora

   • Ta-You Wu

   OriginalPaper Pages: 40 - 66

8. Optical theory of chromatic emulsions and of the Christiansen experiment

   • G. N. Ramachandran

   OriginalPaper Pages: 67 - 79