VI CONTENTS OF VOL. XXIII. FIFTH SERIES. 



Page 

 On the Strength of the Terrestrial Magnetic Field in Build- 

 ings, by M. Aime Witz 381 



On Metallic Layers which result from the Volatilization of a 



Kathode, by Bernhard Dessau 384 



On the Passage of the Electric Current through Air under 

 ordinary circumstances, by J. Borgmann 384 



NUMBER CXLIV.— MAY. 



Dr. W. W. J. Nicol on the Expansion of Salt-Solutions. 

 (Plates V. & VI.) 385 



Prof. S. U. Pickering on Delicate Thermometers 401 



Prof. S. U. Pickering on the Effect of Pressure on Thermo- 

 meter-bulbs and on some Sources of Error in Thermometers 406 



Mr. E. H. M. Bosanquet on the Determination of Coefficients 

 of Mutual Induction by means of the Ballistic Galvanometer 

 and Earth-Inductor 412 



Mr. W. Brown on the Effects of Percussion and Annealing on 

 the Magnetic Moments of Steel Magnets 420 



Prof. Tait on the Assumptions required for the Proof of 

 Avogadro's Law 433 



Drs. W. Ramsay and S. Young on Evaporation and Dissocia- 

 tion. — Part VI. On the Continuous Transition from the 

 Liquid to the Gaseous State of Matter at all Temperatures. 

 (Plates VII., VIII., IX., & X.) 435 



Sir W. Thomson on the Stability of Steady and of Periodic 

 Fluid Motion 459 



Notices respecting New Books : — 



Profs. Oliver, Wait, and Jones's Treatise on Algebra .... 465 



Proceedings of the Geological Society : — 



Mr. T. Roberts on the Correlation of the Upper Jurassic 



Rocks of the Jura with those of England 466 



Rev. A. Irving on the Physical History of the Bagshot 

 Beds of the London Basin 467 



On the Inert Space in Chemical Reactions, by Oscar Liebreich 468 



Apparatus for the Condensation of Smoke by Statical Elec- 

 tricity, by H. Amaury 471 



On the Heating of the Glass of Condensers by Intermittent 

 Electrification, by J. Borgmann 472 



On the Chemical Combination of Gases, by Prof. Ostwald . . 472 



NUMBER CXLV.— JUNE. 



Mr. R. P. Muirhead on the Laws of Motion 473 



Mr. C. V. Boys on the Production, Properties, and some sug- 

 gested Uses of the Einest Threads 489 



