IV CONTENTS OF VOL. VI 11. FIFTH SERIES. 



Prof. J. J. Sylvester on an Equation in Finite Differences . . L20 

 Mr. J. J. Hood on the Laws of Chemical Change.— Part II. . 121 

 Vvo'i. S. P. Thompson's Notes From the Physical Laboratory 



o\ University College, Bristol 129 



Mr. ,1. II. Biiket on the Dissociation of Aniline Colours .... 136 

 Dr. F. Auerbach on the Passage of the Galvanic Current 



through Iron 138 



Mr. s. Tolver Preston on the Possibility of accounting for the 

 Continuance of Recurring Changes in the Universe, con- 

 sistently with the Tendency to Temperature-Equilibrium . . 152 



Mr. O. Heaviside on the Theory of Faults in Cables 163 



Note on the Spectrum of Brorsen's Comet, by Prof. C. A. 



Young, of Princeton, N. J 178 



On Stokes's Law, by M. Lamansky 179 



NUMBER XLVIII.— SEPTEMBER. 



Mr. M. M. Pattison Muir on Chemical Affinity 181 



Sir J. Conrov on the Distribution of Heat in the Visible Spec- 

 trum . . . . 203 



Professors J. Perry and W. E. Ayrton on Structures in an 

 Earthquake Country 209 



Dr. P. Auerbach on the Passage of the Galvanic Current 

 through Iron 217 



Dr. J. Kerr's Electro-optic Observations on various Liquids. 229 



Sir Gr. B. Airy on the Construction and Use of a Scale for 

 G-uaging Cylindrical Measures of Capacity 246 



Mr. C. Clarke Hutchinson on a Convenient Source of Heat for 

 Chemical Operations 250 



Notices respecting New Books : — 



Dr. Gr. Grove on the Art of Scientific Discovery, or the 

 general conditions and methods of research in Physics 



and Chemistry 252 



AVheatstone's Scientific Papers 255 



The Action of Magnetism in Motion on Static Electricity, 

 and Inertia of Static Electricity, by Gr. Lippmann 256 



On the Sensibility of the Organ of Hearing, by W. Kohlrausch. 257 



On a Direct Measurement of the Work of Induction, and a 

 thence-derived Determination of the Mechanical Equivalent 

 of Heat, by Dr. A. von Waltenhofen, of Prague 258 



On the Radiometer, by Dr. J. Puluj 259 



NUMBER XLIX.— OCTOBER. 



Lord Rayleigh's Investigations in Optics, with special refer- 

 ence to the SpectrDscope. (Plate VII.) 261 



