LIST OF ILLUSTRATIONS. 



Plate 1. Sir F. W. DYSON, Prof. A. S. EDDINGTON, and Mr. C. DAVIDSON on a 

 Determination of the Deflection of Light by the Sun's Gravitational Field, from 

 Observations made at the Total Eclipse of May 29, 1919. 



Plates 2-5. W. M. HICKS : A Critical Study of Spectral Series. Part V. The 

 Spectra of the Monatomic Gases. 



