CONTENTS OF VOL. XXX. FIFTH SERIES. V 



Page 

 Mr. W. A. E. Ussher on the Devonian Bocks of South 



Devon 195 



Air. S. S. Buckrnan on the so-called Upper-Lias Clay of 



Down Cliffs 196 



Miss M. I. Gardiner on Contact-alteration at New 



Galloway 197 



Rev. A. Irving on the Age, Composition, and Structure of 



the Plateau-gravels of East Berkshire and West Surrey 198 

 Mr. B. N. Worth on the Existence of Triassic Bocks in 



the English Channel off the Coast of Cornwall 199 



Mr. B. M. Browne on certain " Changes of Level" along 



the Shores on the Western side of Italy 200 



Prof. G. H. F. Ulrich on the Discovery, Mode of Occur- 

 rence, and Distribution of the Nickel-Iron Alloy 

 ' Awaruite ' and the Bocks of the District on the West 

 Coast of the South Island of New Zealaud in which it 



is found 200 



Note on Diamagnetisin. and Carnot's Principle, by Dr. 0. Lodge 201 

 A Method of Detecting Chemical Lnion of Metals, by Dr. G. 



Gore 202 



On the Spectra of the Alkalies, bv Prof. H. Kayser and Prof. 



C.Bunge ',. ' 203 



On the Electrical Series for Erictional Electricity, by J". Schiff 204 



NUMBER CLXXX1V.— SEPTEMBER. 



Prof. J. A. Ewing's Contributions to the Molecular Theory 



of Induced Magnetism 205 



Prof. J. Perry on a Formula for Calculating approximately 



the Self-induction of a Coil " 223 



Dr. G. Gore on the Changes of Property of Amalgams by 



Repeated Fusion 228 



Dr. O. Lodge on the Electrostatic Force between Conductors 



conveying Steady or Transient Currents 230 



Prof. C. G. Knott on the Interactions of Circular and Longi- 

 tudinal Magnetizations 244 



Prof. C. V. Boys on Photographs of Rapidly Moving Objects, 



and on the Oscillating Electric Spark. (Plate VI.) 248 



Messrs. S. P. Langley and F. W. Very on the Cheapest Form 



of Light, from Studies at the Allegheny Observatory 260 



Proceedings of the Geological Society : — 



Mr. J. Postlethwaite on the Borrowdale Plumbago, its 



Mode of Occurrence and probable Origin 280 



Mr. O. A, Shrubsole on the Valley-Gravels about Beading, 

 with especial reference to the Palaeolithic Implements 

 found therein 281 



