CONTENTS OF VOL. XI.— FIFTH SERIES. Vll 



NUMBEE LXXL— SUPPLEMENT. 



Pag 

 Mr. E. H. Cook on the Existence of the Luminiferous ^Ether 477 

 Mr. B. H. M. Bosanquet on the Beats of Consonances of the 



Form h : 1 492 



Prof. Helmholtz on Stereoscopic Vision 507 



Messrs. Gladstone and Tribe on Thermal Electrolysis 508 



Prof. A. G. Bell upon the Production of Sound by Badiant 



Energy. (Plates X. & XI.) 510 



Dr. O. J. Lodge on Action at a Distance, and the Conservation 



of Energy 529 



Messrs. Wanklyn and Cooper on some new Apparatus for use 



in Gas-analysis 534 



Notices respecting New Books : — 



Miscellaneous Scientific Papers by the late W. J. Mac- 



quorn Bankine, C.E 536 



Proceedings of the Geological Society: — 



Mr. T. V. Holmes on the Permian, Triassic, and Liassic 



Bocks of the Carlisle Basin 538 



Dr. G. M. Dawson on the Superficial Geology of British 



Columbia and its adjacent regions 539 



Mr. C. Parkinson on the Upper Greensands and Chloritic 



Marl of the Isle of Wight 540 



Mr. C. Eeid on the Plow of an Ice-sheet, and its Con- 

 nexion with Glacial Phenomena 541 



Mr. B. "W. Coppinger on Soil-cap Motion 541 



On the Internal Discharges of Electrical Condensers, by E. 



Villari 541 



On the Secular Inequalities in Terrestrial Climates depending 

 on the Perihelion Longitude and Eccentricity of the Earth's 

 Orbit, by the Bev. Dr. Haughton 543 



PLATES. 



I. Illustrative of MM. Lecher and Pernter's Paper on the Absorption 



of dark Heat-rays by Gases and Vapours. 



II. Illustrative of Messrs. Nichols and Wheeler's Paper on the Coeffi- 



cient of Expansion of Gas-solutions. 



III. Blustrative of Dr. C. B. A. Wright's Paper on the Determination 

 of Chemical Affinity in terms of Electromotive Force. 



IV.-VII. Illustrative of Mr. B. H. M. Bosanquet's Paper on the Beats 

 of Consonances of the Form h : 1 . 



VIII. Illustrative of Mr. C. V. Boys's Paper on an Integrating-Machine. 



IX. Illustrative of Messrs. Bowland and Nichols's Paper on the Elec- 



tric Absorption of Crystals. 



X. & XL Blustrative of Prof. A. G. Bell's Paper upon the Production 



of Sound by Badiant Energy. 



