1. The atmosphere of the earth

   • C. V. Raman

   OriginalPaper Pages: 123 - 129

2. Electron paramagnetic resonance of Mn²⁺ in (NH₄)₂SO₄ single crystal

   • B. V. R. Chowdari
   • Putcha Venkateswarlu

   OriginalPaper Pages: 130 - 137

3. Rigidity spectrum of cosmic ray helium nuclei

   • K. C. Anand
   • R. R. Daniel
   • R. K. Puri

   OriginalPaper Pages: 138 - 154

4. Studies on the sol-gel transformation of silicic acid sol in presence of dyes

   • Wahid U. Malik
   • Iqbal A. Khan

   OriginalPaper Pages: 155 - 165

5. X-ray spectroscopic study of chemical bonding in MnSe₂ and CoSe₂

   • Chintamani Mande
   • A. S. Nigavekar

   OriginalPaper Pages: 166 - 174