﻿CONTENTS op N° 248. — Fourth Series. 



XXII Historical Notes on some Phenomena connected with the 

 Boiling of Liquids. By Charles Tomlinson,F.R.S page 161 



XXIII On the Compounds of Ethylene-sodium and of its Homo- 

 logues. By J. Alfred Wanklyn, Professor of Chemistry in the 

 London Institution • 



XXIV. Fundamental Principles of Molecular Physics. By Pro- 

 fessor J. Bayma, S. J., of Stonyhurst College 182 



XXV. On the Theory of Sound. By E. Moon, M.A., Honorary 

 Fellow of Queens College, Cambridge 



*XXVI. On the Physical Cause of the Motion of Glaciers. By 



James Croll, of fhe Geological Survey of Scotland 201 



XXVII On Mr. J. Croix's paper » On Geological Time, and the 

 probable Date of the Glacial and the Upper Miocene Period." By R. ^ 

 A. Peacock, C.E 



XXVIII. Contributions to the Knowledge of the Spectra of the 

 Flames of Gases containing Carbon. By Anurew Lieleoo Professor 



at the National Upper Practical School at St. Pb'lten, Austna 208 



XXIX. The Secular Effects of Tidal Action. By Daniel Vauohan, ^ 



Esq 



XXX. The Story of an Equation in Differences of the Second ^ 

 Order. By J. J. Sylvester 



XXXI. Proceedings of Learned Societies :— 



Royal Society :-Mr. W. Crookes on the Measurement of the 



Luminous Intensity of Light , Canon Moseley on the Mecha- 

 nical Possibility of the Descent of Glaciers by their We.ght 



227-235 



only 



XXXII Intelligence and Miscellaneous Articles :— 



Formation of an Artificial Spectrum with one Fraunhofer's Line, i 



by A. Wiillner ' ' " 



On the Quantity of Electricity produced by the Electrophorus 



Machine expressed in Absolute Measure, by F. Kohlrausch. . 236 

 On the Interference of Liquid Waves, by M. Lissajous 240 



Lion Court. Fleet Street, London. 



