IV CONTENTS OP VOL. XXXTX. FOURTH SERIES. 



Page 

 M.-F. Kohlrausch's Determination of the Absolute Horizontal 

 Intensity of the Earth's Magnetism by Measurement of a 



Current* , .' 114 



Mr. W. H. Walenn's Remarks on the Atomic Theory 122 



Prof. W. A. Norton on the Fundamental Principles of Mole- 

 cular Physics 126 



M. V. Regnault's Memoir on the Expansion of Gases 127 



Proceedings of the Royal Society : — 



Dr. H. E. Roscoe's Researches on Vanadium. — Part II. . . 146 

 Dr. T. Andrews on the Continuity of the Gaseous and 



Liquid States of Matter 150 



On the Simultaneous Occurrence of a Soluble Lead-salt and free 

 Sulphuric Acid in Sherry Wine ; with observations on the 

 Solvent Action of Alcoholic Saline Solutions upon Sulphate 



of Lead, by Professor F. H. Storer 154 



On Auroral Appearances and their connexion with the Pheno- 

 mena of Terrestrial Magnetism, by Balfour Stewart, F.R.S., 

 F.R.A.S . .• 159 



NUMBER CCLX.— MARCH. 



Dr. E. Warburg on the Deadening of the Sounds of Solid 



Bodies by Internal Resistances 161 



Mr. T. T. P. B. Warren's Notes on Professor Fleeming Jenkin's 



Formula 169 



Mr. E. L. Garbett on Popular Difficulties in Tide Theory 174 



Mr. J. Croll on Ocean-currents. — Part II. Ocean-currents in 



relation to the Physical Theory of Secular Changes of Climate . 1 80 



Prof. Reusch on Mica-combinations 195 



Sir James Cockle on Criticoids 201 



Dr. W. J. M. Rankine on the Thermal Energy of Molecular 



Vortices 211 



M. L. Soret on Illumination and Polarization in Transparent 



Substances 221 



M. A. De la Rive on the Organic Dust of the Air 229 



Proceedings of the Royal Society : — 



Dr. J. H. Gladstone on the Refraction-Equivalents of the 



Elements 231 



On Comets and Meteors, by Daniel Kirkwood, LL.D., Professor 



in Indiana University 233 



On a possible Cause of the Gulf-stream, by Robert Gill, Esq. 238 



NUMBER CCLXI.— APRIL. 



Canon Moseley on the " Veined Structure " of the Ice of Gla- 

 ciers. (With a Plate.) .....' 241 



