1. Ultra-violet absorption spectra and higher excited states of Nd³⁺ in LaCl₃ at 77° K.

   • R. M. Agrawal
   • R. K. Asundi
   • Shobha Singh

   OriginalPaper Pages: 325 - 329

2. The influence of disturbed conditions and increased solar activity on geomagnetic distortion of the equatorial ionospheric F2 region

   • B. N. Bhargava
   • R. V. Subrahmanyan

   OriginalPaper Pages: 330 - 344

3. Synthesis of 3:4 dihydro-5-methyl-2H-pyrano-(2, 3-b)-quinoline

   • V. T. Ramakrishnan
   • P. Shanmugam

   OriginalPaper Pages: 345 - 349

4. Investigation of secondary flow on an infinite yawed cylinder with 15 per cent. Thick Joukowski profile as section

   • Rajeshwar Prasad Singh
   • K. D. P. Sinha

   OriginalPaper Pages: 350 - 359

5. Studies in heterocyclic N-oxides

   • K. Ramaiah
   • V. R. Srinivasan

   OriginalPaper Pages: 360 - 366

6. Angular distribution of jets produced by heavy primary cosmic-ray nuclei

   • E. Balea
   • E. M. Friedländer
   • M. Sahini

   OriginalPaper Pages: 367 - 392