[ iii ] 
CONTENTS. 
(A) 
VOL. 197. 
List of illustrations. . page v 
Advertisement.vii 
I. The Integration of the Equations of Propagation of Electric Waves. By A. E. 
H. Love, F.R.S., Sedleian Professor of Natural Philosophy in the University 
of Oxford . page 1 
II. Argon and its Companions. By William Kamsay, F.R.S., and Morlms W. 
Travers. 47 
III. On the Theory of Consistence of Logical Class-frequenciesand its Geometrical 
Representation. By G. Udny Yui.'e, formerly Assistant Professor of Aqjplied 
Alathematics in University College, London. Communicated Iny Professor 
K. Pearson, F.R.S. . 91 
IV. The Action of Magnetised Electrodes upon Electrical Discharge Phenomena in 
Rarefied Gases. By C. E. S. Phillips. Communicated Iny Sir William 
Crookes, F.R.S. .135 
V. Total Ficlip)se ofi the Sun, January 22, 1898.— Observations at Viziadrug. By 
Sir Norman Lockyer, K.C.B., ER.S., Captain CmsHOLMrPATTEN, R.N., 
and Professor A. Pedler, ER.S. .151 
a 2 
