IV CONTENTS OF VOL. XXVI. FIFTH SERIES. 



Mr. Charles Tomlinson on some Effects of Lightning 114 



Dr. T. E. Thorpe and Mr. A. W. Eiicker on some Additions 



to the Kew Magnetometer 122 



Messrs. W. "W. Haldane Gree and H. Holden's Experiments 



on Electrolysis. — Part II. Irreciprocal Conduction.(Plate I.) 126 

 Mr. J. T. Bottomley on a Practical Constant- Volume Air- 

 Thermometer 149 



Prof. Silvanus P. Thompson on Continuous-current Trans- 

 formers 157 



Dr. "W. E. Magie on the Contact- Angle of Liquids and Solids 162 

 Mr. Carl Barus on Maxwell's Theory of the Viscosity of Solids 



and its Physical Verification 183 



Prof. Oliver J. Lodge on the Theory of Lightning-Con- 

 ductors 217 



Notices Respecting New Books : — 



Messrs. P. Muir and C. Slater's Elementary Chemistry. . 230 

 Messrs. P. Muir and D. Carnegie's Practical Chemistry . 230 

 Dr. W. Dittmar's Exercises in Quantitative Chemical 



Analysis 231 



Proceedings of the Geological Society : — 



Dr. F. H. Hatch on the Spheroid-beariug Granite of 



Mullaghderg, Co. Donegal 232 



Sir J. W. Dawson on the Eozoic and Palaeozoic Rocks of 

 the Atlantic Coast of Canada in comparison with those 

 of "Western Europe and the Interior of America .... 233 

 Capt. E. W. Hutton on a Hornblende-biotite Rock from 



New Zealand 234 



Mr. G-odley on Rubies in the Matrix from Burmah .... 235 

 Mr. J. H. Collins on the Sudbury Copper Deposits 



(Canada) 235 



Mr. G-. Attwood on the Auriferous Tracts of Mysore 



Province, Southern India 236 



Mr. E. Wilson on the Durham Salt-district 237 



Mr. C. Davison on the Movement of Scree-material .... 237 



On the Electroareometer, by W. Michelson 238 



On the Secondary Arcs which accompany the Rainbow, by M. 

 Boitel «! 239 



NUMBER CLX.— SEPTEMBER. 



Lord Rayleigh on the Reflexion of Light at a Twin Plane of a 

 Crystal 241 



Lord Rayleigh on the Remarkable Phenomenon of Crystalline 

 Reflexion described by Prof. Stokes 256 



Mr. J. Joly on a Hydrostatic Balance (Plate II.) 26Q 



