CONTENTS OF VOL. XXVII. — FIFTH SERIES. 



Prof. J. Willard Gibbs's Comparison of the Electric Theory of 

 Light and Sir William Thomson's Theory of a Quasi-labile 



^ther 238 



Mr. A. E. H. Love on the Oscillations of a E-otating Liquid 



Spheroid and the G-enesis of the Moon 254 



Lord Eayleigh on the History of the Doctrine of Eadiant 



Energy 265 



Mr. William Brown on Steel Magnets 270 



Notices respecting New Books : — 



Journal and Proceedings of the Eoyal Society of New 



South Wales, Vol. XXn. Part 1 277 



Proceedings of the Geological Society : — 



Dr. A. Dunlop on the Jersey Brick Clay 278 



Prof. J. W. Judd on the Growth of Crystals in Igneous 



Pocks after their Consolidation 278 



Prof. J. W. Judd on the Tertiary Volcanoes of the 



Western Isles of Scotland 279 



Dr. J. Croll on the Prevailing Misconceptions regarding 

 the Evidence which we ought to expect of former Glacial 



Periods 281 



On Irreciprocal Conduction, by Dr. C. Eromme 282 



On the Photography of the Solar Spectrum, by Lieut.-Col. J. 



Waterhouse 284 



Experiments with the Spark of a Large Battery, by A. Eighi. 285 

 Measurements of Eadiation on the Sonnblick in February 



1888, Dr. J. M. Pernter 287 



Theory of Isohydric Solutions, by Sv. Arrhenius .......... 287 



On an Electrochemical Actinometer,byMM. Gouy and Eigollot. 288 



NUMBEE CLXVIL— APEIL. 



Prof. Dr. H. Hertz on Bays of Electric Force 289 



Lord Eayleigh on the Limit to Interference when Light is 



radiated from Moving Molecules 298 



Mr. W. Sutherland on the Law of Molecular Force 305 



Dr. J. W. W. Waghorn on the Measurement of Eesistance . . 322 

 Prof. G. F. Fitzgerald on the Dimensions of Electromagnetic 



Units 323 



Mr. O. Heaviside on the Electromagnetic Effects due to the 



Motion of Electrification through a Dielectric 324 



Dr. 0. Lodge on the Eotation of the Plane of Polarization of 



Light by the Discharge of a Leyden Jar. With Appendix 



by A. Lodge 339 



Prof. J. V. Jones on the Use of Lissajous' Figures to determine 



a Eate of Eotation, and of a Morse Eeceiver to Measure the 



Periodic Time of a Eeed or Tuning-fork 349 



