[ Hi ] 
CONTENTS. 
(A) 
VOL. 222. 
List of Illustrations.page v 
Advertisement . .. vii 
I. The Emission of Electrons under the Influence of Chemical Action. By O. W. 
Richardson, F.R.S., Wheatstone Professor of Physics, University of London, 
Kings College . page 1 
II. The Problem of Finite Focal Depth revealed by Seismometers. By George W. 
Walker, A.R.C.Sc., ALA., F.R.S., formerly Fellow of Trinity College, 
Cambridge . 45 
III. Eddy-Current Losses in Cylindrical Conductors, with Special Applications to 
the Alternating Current Resistances of Short Coils. By S. Butterworth, 
M.Sc. Communicated by F, E. Smith, F.R.S. ( From. the National Physical 
Laboratory) . 57 
IV. The Lnfluence of Satellites upon the Form of Saturn's Ring. By G. R. 
Goldsbrough, D.Sc., Armstrong College, Newcastle-on-Tyne. Communicated 
by Prof. T. H. Havelock, F.R.S. . 101 
a 2 
