1. The structure of opal and the origin of its iridescence

   • C. V. Raman
   • A. Jayaraman

   OriginalPaper Pages: 101 - 108

2. Measurement of the electrical conductivity in the upper air by radiosonde

   • S. P. Venkiteshwaran
   • B. K. Gupta
   • B. B. Huddar

   OriginalPaper Pages: 109 - 115

3. The rotation of an infinite plane lamina in a viscous compressible fluid

   • S. D. Nigam

   OriginalPaper Pages: 116 - 119

4. A note on a paper of R. C. Buck

   • S. K. Singh

   OriginalPaper Pages: 120 - 121

5. Synthetic experiments in the benzopyrone series

   • P. K. Grover
   • T. R. Seshadri

   OriginalPaper Pages: 122 - 127

6. Petroselinic acid: Occurrence in some umbelliferæ seed fats

   • K. N. Menon
   • P. S. Raman

   OriginalPaper Pages: 128 - 131

7. Heterocyclic compounds

   • K. N. Menon
   • P. S. Raman

   OriginalPaper Pages: 132 - 134

8. Dehydration of castor oil by substituted sulphonic acids and their salts

   • K. K. Dole
   • V. R. Keskar

   OriginalPaper Pages: 135 - 142

9. The motion of four rectilinear vortex filaments

   • S. K. Lakshmana Rao

   OriginalPaper Pages: 143 - 147

10. Studies in colloid optics

    • P. K. Katti

    OriginalPaper Pages: 148 - 160

11. Raney nickel reductions

    • V. Ramanathan
    • B. D. Tilak
    • K. Venkataraman

    OriginalPaper Pages: 161 - 175

12. The dipole moments of furoin and hydrofuramide

    • Sundaresa Soundararajan
    • S. V. Anantakrishnan

    OriginalPaper Pages: 176 - 183

13. Experimental investigation of noise associated with modulated pulses

    • V. Narayana Rao

    OriginalPaper Pages: 184 - 193

14. Some regularities in the masses of heavy particles

    • Kantilal M. Gatha

    OriginalPaper Pages: 194 - 198