[ 469 ] 
INDEX 
TO THE 
PHILOSOPHICAL TRANSACTIONS. 
Series A, Vol. 220. 
B. 
Bakeeian Lectuee (Paesons), 67. 
Beomwich (T. J. I’A.) The Scattering of Plane Electric Wares by Spheres, 175. 
Buenham (T. II,). See DaPFiELD (and others). 
D. 
Datidson (C ). See Dyson (and others). 
Datis (A. H.). See Duffieid (and others). 
Diamond, artificial production of (Paesons), 67. 
Deffield (W. G.) (and others). The Pressure upon the Poles of the Electric Arc, 109. 
Dyson (Sir E.) (and others). A Determination of the Deflection of Light by the Sun’s Gravitational Field, from 
Observations made at the Total Eclipse of May 29, 1919, 291. 
E. 
Eclipse of May 29,1919 (Dyson and others), 291. 
Eddington (A. S.). See Dyson and others. 
Electric arc, pressure upon poles of (Duffield), 109. 
Electric waves, scattering of plane, by spheres (Beomwich), 175. 
Electrodynamics, fundamental formulations of (Livens), 207. 
Electromagnetic integrals (Geeenhill), 35. 
G. 
Geeenhill (Sir G.). Electromagnetic Integrals, 35. 
H. 
Helium, intensity relations in the spectrum of (Meeton and Nicholson), 137. 
Hicks (W. M.). A Critical Study of Spectral Series. Part V.—The Spectra of the Monatomic Gases, 335. 
Integrals, electromagnetic (Geeenhill), 35. 
VOL. CCXX.-A. 
I. 
3 S 
[Published June 8, 1920. 
