1. The optic interference figures of amethystine quartz—Part I

   • S. Pancharatnam

   OriginalPaper Pages: 201 - 209

2. The optic interference figures of amethystine quartz—Part II

   • S. Pancharatnam

   OriginalPaper Pages: 210 - 229

3. The factors that affect alkali colour reactions of flavonols: A study of flavonols of uncommon types

   • V. K. Ahluwalia
   • N. R. Krishnaswami
   • C. Venkataramani

   OriginalPaper Pages: 230 - 237

4. Gravimetric determination of thorium and its separation from uranium, cerite earths and ceric salts

   • G. M. Saxena
   • T. R. Seshadri

   OriginalPaper Pages: 238 - 243

5. Heterocyclic compounds

   • P. S. Raman

   OriginalPaper Pages: 244 - 253

6. Effect of methyl orange on the capacity of the dropping mercury electrode

   • S. L. Gupta

   OriginalPaper Pages: 254 - 262

7. Errata

   • Putcha Venkateswarlu
   • R. D. Verma

   Erratum Pages: 263 - 263

8. Errata

   • Putcha Venkateswarlu
   • R. D. Verma

   Erratum Pages: 263 - 263