[ iv ] 
VII. On the Fundamental Formulations of Electrodynamics. By G. H. Livens, 
University of Manchester. Communicated hy W, M. Hicks, F.R.S. page 207 
VIIL The Infuence of Molecular Constitution and Temperature on Magnetic 
Susceptibility. Part IV.—Further Applications of the Molecular Field. By 
A. E. Oxley, Major, R.A.F., M.A., D.Sc., Mackinnon Student of the Royal 
Society. Communicated hy Prof. J. W. Nicholson, F.R.S. .... 247 
IX. A Determination of the Deflection of Light by the Suns Gravitational Field, 
from Observations made at the Total Eclipse of May 29, 1919. By Sir F. W. 
Dyson, F.R.S., Astronomer Royal, Prof. A. S. Eddington, F.R.S., and 
Mr. C. Davidson. {Communicated by the Joint Permanent Eclipse 
Committee) . 291 
X. A Critical Study of Spectral Series. Part V.—The Spectra of the Monatomic 
Gases. By W. M. Hicks, F.R.S. . 335 
Index to Volume 
469 
