CONTENTS OF VOL. XXIX. FIFTH SERIES. V 



Page 

 Messrs. G. A. J. Cole and J. W. Gregory on the Vario- 



litic Rocks of Mont-Genevre 286 



Prof. John W. Judd on the Propylites of the Western 

 Isles of Scotland, and their Relations to the Andesites 



and Diorites of the District 287 



Note on the Gradual Alteration in Glass produced by altering 

 its Temperature a few Degrees, by Spencer U. Pickering. . 289 



On a Telethermoineter, by Prof. Dr. J. Puluj 291 



On the Measurement of Electromotive Contact Forces of 

 Metals in Different Gases by Means of the Ultra- Violet 



Kays, by A. Kighi : 291 



Mr. Enright's Experiments, by Oliver J. Lodge 292 



NUMBER CLXXIX.— APRIL. 



H. E. J. G. du Bois on Magnetization in Strong Eields at 

 Different Temperatures. (Plate VIII.) 293 



Messrs. J. S. Haldane and M. S. Pembrey on an Improved 

 Method of Determining Moisture and Carbonic Acid in Air 306 



Dr. t J. R. Rydberg on the Structure of the Line-Spectra of the 

 Chemical Elements 331 



Mr. Carl Barus on the Change of the Order of Absolute Vis- 

 cosity encountered on passing from Eluid to Solid 337 



Profs. T. Gray and C. L. Mees on the Effect of Permanent 

 Elongation on the Cross Section of Hard-drawn Wires .... 355 



Prof. J. J. Thomson on the Passage of Electricity through 

 Hot Gases 358 



Prof. Wyndham R. Dunstan and Mr. T. S. Dymond on an 

 Apparatus for the Distillation of Mercury in a Vacuum . . 367 



Notices respecting New Books : — 



Transactions of the Edinburgh Geological Society, Vol. VI. 

 Part 1 372 



On Electrical Vibrations in Straight Conductors, by Prof. J. 

 Stefan „ 373 



Electrical Vibrations in Rarefied Air without Electrodes, by 

 James Moser 375 



On the Formation of Ozone by the Contact of Air with Ignited 

 Platinum, and on the Electrical Conductivity of Air ozonized 

 by Phosphorus, by Profs. Elster and Geitel 376 



Note in Connexion with Dropping-Mercury Electrodes, by J. 

 Brown 376 



