CONTENTS OF VOL. XXIX. 



(FIFTH SERIES). 



NUMBER CLXXVL— JANUARY 1890. 



Page 



Lord Rayleigh on Bells 1 



Ladislaus Natanson on the Kinetic Theory of the Phenomena 



of Dissociation in G-ases 18 



Prof. S. P. Langley and Mr. F. W. Very on the Temperature 



of the Moon ' 31 



Mr. W. Gr. Gregory on a New Electric Radiation Meter . . 54 

 Mr. J. Enright on Electrifications due to the Contact of Gases 



with Liquids 56 



Mr. Herbert Tomlinson on the Effect of Repeated Heating 



and Cooling on the Electrical Resistance of Iron 77 



Prof. Tait on the Importance of Quaternions in Physics .... 84 

 Prof. T. Carnelley on an Approximate Algebraic Expression of 



the Periodic Law of the Chemical Elements. (Plate I.) . . 97 



Mr. A. L. Selby on two Pulsating Spheres in a Liquid 113 



H. Nagaoka on Transient Electric Current produced by 



suddenly twisting Magnetized Iron and Nickel Wires. 



With Note by Sir W. Thomson. (Plate II.) 123 



Proceedings of the Geological Society : — 



Mons. F. M. Corpi on the Catastrophe of Kantzorik, 



Armenia 133 



Mr. R. JT. Worth on the Igneous Constituents of the 



Triassic Breccias and Conglomerates of South Devon . 134 

 Capt. A. W. Stiffe on the Glaciation of parts of the Valleys 



of the Jhelam and Sind Rivers, Kashmir 135 



The Magnetism of Nickel and Tungsten Alloys, by John 



Trowbridge and Samuel Sheldon 136 



Note on the Application of Hydraulic Power to Mercurial 



Pumps, by Rev. Frederick J. Smith 13S 



On Evaporation and Solution as Processes of Diffusion, by 



Prof. J. Stefan 139 



On the Changes of Temperature resulting from the Torsion 



and Detorsion of Metal Wires, by Dr. A. Wassmuth .... 140 



