IV CONTENTS OF VOL. XLVI. FIFTH SERIES. 



Proceedings of the Geological Society : — 



Rear- Admiral Sir W. J. Wharton on Clipperton Atoll . . 165 



Mr. J. J. H. Teall on a Phosphatized Trachyte from 

 Clipperton Atoll 166 



Mr. P. W. Harmer on the Pliocene Deposits of the East 

 of England 166 



Mr. Clement Reid on the Eocene Deposits of Devon . . 168 



Mr. A. J. Jukes-Browne on an Outlier of Cenomanian 

 and Turonian near Honiton 168 



Mr. W. S. G-resley on Cone-in-Cone 168 



Exhibitions by Prof. T. Rupert Jones and Prof. H. G. 

 Seeley 169 



Mr. "W. Cunnington on some Palaeolithic Implements 

 from the Plateau-Gravels, and their Evidence con- 

 cerning " Eolithic " Man 169 



Mr. S, S. Buckman on the Grouping of some Divisions 

 of Jurassic Time 170 



Mr. H. G. Madan on an Ebbing and Flowing Well at 

 Newton Nottage (Glamorganshire) 171 



Mr. T. B. E. Sam on the Origin of the Auriferous Con- 

 glomerates of the Gold Coast Colony (W. Africa). . . . 171 

 On the Function of the Condenser in a Ruhmkorff's Coil, by 

 B. Walter 172 



NUMBER CCLXXIX.— AUGUST. 



Gustaf E. Svedelius on the Anomalous Changes in the 



Length and Temperature of Iron and Steel during Re- 



calescence 173 



Dr. M. Smoluchowski de Smolan on Conduction of Heat by 



Rarefied Gases 192 



Messrs. Edwin Edser and C. P. Butler on a Simple Method 



of Reducing Prismatic Spectra 207 



Mr. T. E. Doubt on the Measurement of Colour and the 



Determination of White Light 216 



Dr. W. E. Adeuey and Mr. James Carson on the Mounting of 



the Large Rowland Spectrometer in the Royal University of 



Ireland 223 



Prof. J. D. Everett on Dynamical Illustrations of Certain 



Optical Phenomena 227 



Prof. John Trowbridge on the Behaviour of Air and Rarefied 



Gases under Powerful Electric Stress 243 



Mr. T. C. Porter on a Method of viewing Newton's Rings . . 245 

 Dr. G. Johnstone Stoney on Evidence that Rontgen Rays 



are Ordinary Light 253 



Dr. R. H . Jude on the Application of the Gamma Function 



to an Electrostatic Problem 254 



