CONTENTS OF VOL. IX. FIFTH SERIES. V 



Page 

 Proceedings of the Geological Society : — 



Prof. J. W. Judd on the Oligocene Strata of the Hamp- 

 shire Basin 231 



On Intermittent Currents and the Induction-balance, by O. 



J. Lodge, D.Sc 232 



On the Carrying-power of Magnets, by Prof. J. Stefan 232 



On a Method of Studying the Eeflexion of Sound-waves, by 0. 



N. Rood, Professor of Physics in Columbia College 234 



Experiments on the Compression of Gaseous Mixtures, by L. 

 Cailletet 235 



NUMBEE LVL— APEIL. 



Dr. C. E. Alder Wright on the Determination of Chemical 



Affinity in terms of Electromotive Eorce. — Part 1 237 



Mr. S. Tolver Preston's Suggestion in regard to Crystalliza- 

 tion, on the Hypothesis that Molecules are not infinitely 



Hard 267 



Mr. W. H. Walenn on TJnitation. — X. Practical Eemarks 



thereon, together with Examples 271 



MM. E. H. Koch and Er. Klocke on the Motion of Glaciers. 274 



Lord Eayleigh's Acoustical Observations. Ill 278 



Mr. J. J. Thomson on Maxwell's Theory of Light 284 



Messrs. W. E. Ayrton and J. Perry on the Determination of 



the Acceleration of Gravity for Tokio, Japan 292 



Notices respecting New Books : — 



Geology of Wisconsin. Survey of 1873-77 302 



Mr. G. M. Minchin's Treatise on Statics, containing the 

 fundamental Principles of Electrostatics and Elasti- 

 city 305 



On the Temperature of Erozen Lakes, by E.-A. Eorel 305 



On Gas-frictioQ, and on the Velocity of Electricity in the Elec- 

 tric Current, by Prof. Ludwig Boltzmann 307 



Eesearches on the Eelative Intensity of the Spectral Lines of 

 Hydrogen and Nitrogen in regard to the Constitution of 



Nebulae, by Ch. Eievez 309 



On the Electromotive Eorces which appear in free Jets of Water, 

 by J. Elster 312 



NUMBEE LVIL— MAT. 



Dr. J. H. Long on the Diffusion of Liquids. (Plate VII.) . . 313 

 Mr. J. Eand Capron on the Eelative Intensity of the Spectral 

 Lines of Gases 329 



