CONTENTS OF VOL. XXXV.— FIFTH SERIES. 



Mr. E. C. C. Baly on the Separation and Striation of Eareiied 



Gases under the Influence of the Electric Discharge 200 



Dr. J. H. Gladstone on some Eecent Determinations of 



Molecular Refraction and Dispersion 204 



Mr. Frederick J. Smith on High Resistances used in con- 

 nexion with the D'Arsonval Galvanometer 210 



Mr. William Sutherland on the Laws of Molecular Eorce . . 211 

 Mr. Carl Barus on the Fusion Constants of Igneous Rock. — 

 Part III. The Thermal Capacity of Igneous Rock, con- 

 sidered in its Bearing on the Relation of Melting-point to 



Pressure. (Plate VI.) 296 



Notices respecting New Books : — 



Mr. P. Alexander's Treatise on Thermodynamics 307 



Dr. Carl Barus's Die physikalische Behandlung und die 



Messung hoher Temperaturen 310 



Dr. Ad. Heydweiller's Hiilfsbuch fiir die Ausfiihrung 



elektrischer Messungen 311 



ProceediDgs of the Geological Society : — 



Herr Victor Madsen on Scandinavian Boulders at Cromer 312 

 Miss C. A. Raisin on the Variolite of the Lleyn, and 



associated Volcanic Rocks . 312 



Mr. H. Emmons on the Petrography of the Island of 



Capraja 313 



On a New Electrical Furnace, by M. Henri Moissan ...... 313 



On the Daily Variations of Gravity, by M. Mascart 314 



Preliminary Note on the Colours of Cloudy Condensation, by 

 C. Barus 315 



NUMBER CCXV.— APRIL. 



Dr. Charles V. Burton on Plane and Spherical Sound- Waves 

 of Finite Amplitude 317 



Prof. J. D. Everett on a new and handy Focometer 333 



Mr. G. H. Bryan on a Hydrodynamical Proof of the Equations 

 of Motion of a Perforated Solid, with Applications to the 

 Motion of a Fine Rigid Framework in Circulating Liquid . 338 



Prof. G. M. Minchin on the Magnetic Field of a Circular 

 Current 354 



Dr. John Shields on Hydrolysis in Aqueous Salt- Solutions. . 365 



Dr. G. Johnstone Stoney: Suggestion as to a possible Source 

 of the Energy required for the Life of Bacilli, and as to the 

 Cause of their small Size 389 



On the Magnetization of Iron Rings slit in a Radial Direction, 

 by H. Lehmann 392 



The Specific Heat of Liauid Ammonia, by C. Ludeking and 

 J. E. Starr . 393 



On the Official Testing of Thermometers, by 11, F. Wiebe , 393 



